IP Library › Granted Patent US 12,636,810
Granted Patent B2
US 12,636,810 · App. 19/394,355 · Granted May 26, 2026

Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefrom

Inventors: Min Kuang (Peachtree City, GA); Jun Zhang (Peachtree City, GA)
Assignee: KOPPERS PERFORMANCE CHEMICALS, INC.
B27K3/343A01N43/80B27K3/40C09D5/14C09D125/14C09D167/08C09D191/08B27K2200/10B27K2200/30B27K2240/20B27K2240/50
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,636,810
App. No.
19/394,355
Granted
May 26, 2026
Kind
B2
Abstract

A wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method of treating a wood substrate therewith, and a wood product produced therefrom are provided. The wood preservative composition comprises at least 0.5% by weight of DCOI based on the total weight of the composition and a retaining additive comprising a solvent-borne polymeric resin, a wax, or a combination thereof. A weight ratio of the DCOI to the retaining additive in the composition is in a range of 1:5 to 5:1.

Claims (27)

1 . A wood preservative composition comprising:

1% by weight to 5% by weight of 4,5-dichloro-2-octylisothiazol-3-one (DCOI) based on a total weight of the wood preservative composition;

0.5% by weight to 10% by weight of a retaining additive comprising a wax, wherein a weight ratio of the DCOI to the retaining additive is in a range of 1:4 to 4:1; and

at least 80% by weight of an organic solvent.

2 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1% by weight to 10% by weight of the retaining additive.

3 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1.2% by weight to 5% by weight of the retaining additive.

4 . The wood preservative composition of claim 1 , wherein the retaining additive has a solubility in the organic solvent of at least 0.5% by weight.

5 . The wood preservative composition of claim 1 , wherein the retaining additive has a solubility in the organic solvent of at least 1% by weight.

6 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1.5% by weight to 5% by weight of the DCOI.

7 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises at least 90% by weight of an organic solvent.

8 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a hydrocarbon solvent, an amine solvent, a glycol solvent, a ketone solvent, an ester solvent, an alcohol solvent, a halogenated solvent, a biodegradable organic solvent, or combinations thereof.

9 . The wood preservative composition of claim 1 , wherein the organic solvent comprises diesel, biodiesel, or a combination thereof.

10 . The wood preservative composition of claim 1 , wherein the weight ratio of the DCOI to the retaining additive is in a range of 1:1.5 to 1.5:1.

11 . The wood preservative composition of claim 1 , wherein the wax comprises an olefin wax, a petroleum wax, a carnauba wax, a polyethylene wax, a silicone wax, a polypropylene wax, a polytetrafluoroethylene (PTFE) synthetic wax, or a combination thereof.

12 . The wood preservative composition of claim 1 , wherein the wax comprises a melting point in a range of 40 degrees Celsius to 100 degrees Celsius.

13 . The wood preservative composition of claim 1 , wherein the organic solvent is liquid at room temperature.

14 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a flash point of at least 20 degrees Celsius.

15 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a flash point of at least 30 degrees Celsius.

16 . The wood preservative composition of claim 1 , wherein

the weight ratio of the DCOI to the retaining additive is in a range of 1:1.5 to 1.5:1;

the retaining additive has a solubility in the organic solvent of at least 1% by weight; and

the organic solvent comprises a hydrocarbon solvent, an amine solvent, a glycol solvent, a ketone solvent, an ester solvent, an alcohol solvent, a halogenated solvent, a biodegradable organic solvent, or combinations thereof.

17 . A method of treating a wood substrate, the method comprising:

contacting the wood substrate with the wood preservative composition of claim 1 for a period of time suitable to inhibit fungal decay of the wood substrate.

18 . A wood product produced by the method of claim 14 .

19 . The wood product of claim 15 , wherein the wood product retains at least 0.05 pounds of DCOI per cubic foot of the wood product.

20 . The wood product of claim 15 , wherein the wood product comprises a deck, a rail, a fence, a utility pole, a pile, a railway tie, a railroad bridge, cladding, siding, or a combination thereof.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 23, 2026
From: KUANG, MIN; ZHANG, JUN
To: KOPPERS PERFORMANCE CHEMICALS, INC.
Reel/Frame 074455/0456 →
Continuity (4)
Continuation 19294981 · Aug 8, 2025
Continuation 18294852
Provisional Application 63229817 · Aug 5, 2021
Related Publication 20260070256A1 · Mar 12, 2026
References Cited (102)
US 4143010A · Rak · 1979 [cited by applicant]
US 10201910B2 · Humphrey et al. · 2019 [cited by applicant]
US 12370716B2 · Kuang et al. · 2025 [cited by applicant]
US 12491658B1 · Kuang · 2025 [cited by examiner]
US 20060057300A1 · Cui et al. · 2006 [cited by applicant]
US 20060240263A1 · Ashmore et al. · 2006 [cited by applicant]
US 20060287288A1 · Ashmore et al. · 2006 [cited by applicant]
US 20070175360A1 · Ashmore et al. · 2007 [cited by applicant]
US 20090004497A1 · Blow · 2009 [cited by applicant]
US 20140329014A1 · Cobham · 2014 [cited by applicant]
US 20150144027A1 · Richardson et al. · 2015 [cited by applicant]
US 20170215421A1 · Uhr et al. · 2017 [cited by applicant]
US 20210112812A1 · Arumugam et al. · 2021 [cited by applicant]
US 20240342946A1 · Kuang et al. · 2024 [cited by applicant]
US 20250196393A1 · Kuang et al. · 2025 [cited by applicant]
EP 2586840A1 · 2013 [cited by applicant]
WO 2013158410A1 · 2013 [cited by applicant]
WO 2016201512A1 · 2016 [cited by applicant]
WO 2018183615A1 · 2018 [cited by applicant]
WO 2023096905A1 · 2023 [cited by applicant]
Partial European Search Report, European Application No. 22 89 9338, dated Aug. 26, 2025, 16 pages. [cited by applicant]
International Search Report and Written Opinion for PCT Patent Application No. PCT/US2022/50732 mailed Mar. 27, 2023. [cited by applicant]
International Preliminary Report on Patentability for Patent Application No. PCT/US2022/50732 mailed Jun. 6, 2024. [cited by applicant]
International Search Report and Written Opinion of the International Searching Authority for International Application No. PCT/US2022/074619 mailed Nov. 3, 2022. [cited by applicant]
Invoice from Viance to customer dated Jun. 24, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Invoice from Viance to customer dated Aug. 5, 2022 for fourth sale of UP-50, 1 page. [cited by applicant]
Invoice from shipping company to Viance dated Jun. 8, 2022 for first sale of UP-50, 1 page. [cited by applicant]
De Mattos et al., Correlation Between the Composition and Flash Point of Diesel-Biodiesel Blends, J. Braz. Chem. Soc., vol. 26, No. 2, 393-395, 2015. [cited by applicant]
HCS 25 Treating Oil Safety Data Sheet, Prepared Jan. 3, 2014; Revised on Jan. 15, 2015, 8 pages. [cited by applicant]
Invoice for HCS 25 Treating Oil Dated Jan. 10, 2014, 1 page. [cited by applicant]
Invoice for HCS 25 Treating Oil Dated Apr. 28, 2014, 1 page. [cited by applicant]
Gardner's Commercially Important Chemicals Synonyms, Trade Names and Properties, 2005, John Wiley & Sons, Inc., p. 468. [cited by applicant]
Do Carmo et al., Paraffin solubility curves of diesel fuels from thermodynamic model adjusted through experimental DSC thermograms, 23, Fuel, 2018, pp. 266-273. [cited by applicant]
Wood Treatment Plant Had a Clean Operating Record, Nevada Appeal, Jan. 31, 2002. 3 pages. [cited by applicant]
Evaluation report, DCOI Treatment Analysis—UP50 Treatment 1, 2, 3 and 4, Dec. 3, 2020, 13 pages. [cited by applicant]
Evaluation report, DCOI—UP50, Jan. 7, 2021, 39 pages. [cited by applicant]
Evaluation report, DCOI Summary Report, Apr. 15, 2021, 44 pages. [cited by applicant]
“DCOI Treatments Summary” Presentation, May 2, 2021, 31 pages. [cited by applicant]
“Quick DCOI Summary” Presentation, Dec. 23, 2020, 24 pages. [cited by applicant]
Cover letter submitted to the Environmental Protection Agency for registration of UP-50 and proposed label, dated Feb. 28, 2021, 5 pages. [cited by applicant]
Presentation summarizing evaluations of UP-50 dated Sep. 28, 2020, 4 pages. [cited by applicant]
Document summarizing evaluations of UP-50 dated Sep. 28, 2020, 1 page. [cited by applicant]
Gateau et al., Environmentally friendly properties of vegetable oil methyl esters, OCL, vol. 12 No. 4, JUILLET-AOUT, 2005, pp. 308-313. [cited by applicant]
Business Development and Exclusive Supply Agreement dated Oct. 16, 2018 with amendments, 41 pages. [cited by applicant]
Oct. 27, 2020 United States Environmental Protection Agency Letter from John Herbert to Julie Mann attaching UP-23 Wood Preservative Concentrate Product Label, 3 pages. [cited by applicant]
Jul. 15, 2022 and Jul. 26, 2022 emails reporting transition to UP-50, 3 pages. [cited by applicant]
Jun. 10, 2022 timeline for transitioning to UP-50, 2 pages. [cited by applicant]
Records of UP-50 treatments conducted from Jun. 29, 2022 to Jul. 2, 2022, 9 pages. [cited by applicant]
Jul. 29, 2022 Invoice from Viance's Customer to Third-Party, 8 pages. [cited by applicant]
Jul. 29, 2022 Second Invoice from Viance's Customer to Third-Party, 1 page. [cited by applicant]
Records of UP-50 treatments conducted from Jun. 19, 2022 to Aug. 4, 2022, 23 pages. [cited by applicant]
Declaration By Viance's Customer in Support of Petition for Post Grant Review of U.S. Pat. No. 12,370,716, Mar. 12, 2026, 10 pages. [cited by applicant]
Petition for Post Grant Review of U.S. Pat. No. 12,370,716, [cited by applicant]
Declaration of Dennis Morgan in Support of Petition for Post Grant Review of U.S. Pat. No. 12,370,716, Mar. 12, 2026, 10 pages. [cited by applicant]
Curriculum Vitae of Dennis Morgan, 5 pages. [cited by applicant]
Certified File History of U.S. Pat. No. 12,370,716. [cited by applicant]
U.S. Appl. No. 63/229,817, filed Aug. 5, 2021, 52 pages. [cited by applicant]
PCT/US2022/074619, filed on Aug. 5, 2022, 40 pages. [cited by applicant]
U.S. Appl. No. 63/282,794, filed Nov. 24, 2021, 38 pages. [cited by applicant]
Declaration of Kevin Archer in Support of Petition for Post Grant Review of U.S. Pat. No. 12,370,716, Jan. 21, 2026, 14 pages. [cited by applicant]
UP-50 Internal Manufacturing Specification, Jan. 26, 2021, 30 pages. [cited by applicant]
U.S. Environmental Protection Agency (“EPA”) Approval Letter, Issued Mar. 18, 2022, 7 pages. [cited by applicant]
UP-50 Wood Preservative Concentrate Product Label, Viance, LLC, Mar. 18, 2022, 1 page. [cited by applicant]
Declaration of Barbara Aldinger in Support of Petition for Post Grant Review of U.S. Pat. No. 12,370,716, Jan. 15, 2026, 14 pages. [cited by applicant]
Letter filed to the Washington Department of Ecology dated Jan. 16, 2020 32 pages. [cited by applicant]
EPA Pentachlorophenol Final Registration Review Decision, Case No. 2505, dated Dec. 2021, 45 pages. [cited by applicant]
Viance UP50 Wax Solubility Test Report, Received Dec. 1, 2025, 4 pages,. [cited by applicant]
Proposed Modified Protective Order, PGR No. 2026-00023, 6 pages. [cited by applicant]
Proposed Modified Protective Order showing redlines made to the Default Protective Order. [cited by applicant]
Business Development and Exclusive Supply Agreement dated Feb. 5, 2021, 21 days. [cited by applicant]
American Wood Protection Association (Awpa), 114th Annual meeting paper, Apr. 22-24, 2018, copyright 2018, 42 pages. [cited by applicant]
2019 AWPA Book of Standards, P39-18 Standard (p. 139), 5 pages. [cited by applicant]
2019 AWPA Book of Standards, HSA-18 Standard (p. 161), 5 pages. [cited by applicant]
Purchase order from Viance to toll manufacturer dated Apr. 19, 2022 for first sale of UP-50, 1 page. [cited by applicant]
Purchase order from customer to Viance dated May 18, 2022 for first sale of UP-50, 1 page. [cited by applicant]
Bill of Lading dated May 27, 2022 for first sale of UP-50, 1 page. [cited by applicant]
Invoice from Viance to customer dated Jun. 29, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Sales Order Acknowledgment from toll manufacturer to Viance dated Jun. 29, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Shipping invoice from shipping company to Viance dated Jun. 29, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Bill of Lading dated Jun. 29, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Invoice from Viance to customer dated Jul. 7, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Corrected Invoice from Viance to customer dated Jul. 7, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Mansoori, et al., Fuels and Lubricants Handbook: Technology, Properties, Performance, and Testing; Ch. 19 “Petroleum Waxes”, 2003, 39 pages. [cited by applicant]
Fischer-Tropsch Wax Safety Data Sheet, Sasol, Aug. 31, 2023, Version 1.3, 9 pages. [cited by applicant]
Microcrystalline Wax Safety Data Sheet, The International Group, Inc., Feb. 28, 2025, 8 pages. [cited by applicant]
Diesel Fuel No. 2, Safety Data Sheet, Chevron, Apr. 16, 2020, 9 pages. [cited by applicant]
Biodiesel Safety Data Sheet, Chevron, Feb. 28, 2024, 8 pages. [cited by applicant]
Invoice from toll manufacturer to Viance dated May 20, 2022 for first sale of UP-50, 1 page. [cited by applicant]
Purchase order from Customer to Viance dated May 20, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Invoice from toll manufacturer to Viance dated Jun. 24, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Invoice from shipping company to Viance dated Jul. 6, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Bill of lading dated Jun. 24, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Sales order dated Jun. 20, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Invoice from toll manufacturer to Viance dated Jun. 29, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Email with customer order dated Jul. 26, 2022 for fourth sale of UP-50, 3 pages. [cited by applicant]
Sales order dated Jul. 26, 2022 for fourth sale of UP-50, 1 page. [cited by applicant]
Invoice from toll manufacturer to Viance dated Aug. 5, 2022 for fourth sale of UP-50, 1 page. [cited by applicant]
Bill of Lading dated Aug. 5, 2022 for fourth sale of UP-50, 1 page. [cited by applicant]
Invoice from shipping company to Viance dated Aug. 24, 2022 for fourth sale of UP-50, 1 page. [cited by applicant]
Purchase order from Viance to toll manufacturer dated May 12, 2022 for second sale of UP-50, 1 page. [cited by applicant]
Email with customer order dated Jun. 17, 2022 for third sale of UP-50, 1 page. [cited by applicant]
Invoice from Viance to customer dated May 27, 2022 for first sale of UP-50, 1 page. [cited by applicant]