IP Library › Granted Patent US 12,545,590
Granted Patent B2
US 12,545,590 · App. 17/771,111 · Granted Feb 10, 2026

Halloysite powder

Inventor: Hidefumi Konnai (Tokyo, JP)
Assignee: JFE MINERAL COMPANY, LTD.
C01B33/40C01B33/26C04B20/04C04B35/62826C01P2006/17
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 12,545,590
App. No.
17/771,111
Granted
Feb 10, 2026
Kind
B2
Abstract

Provided is halloysite powder having a small b value. The halloysite powder is powder including a granule in which halloysite including halloysite nanotubes is aggregated, the granule has a first pore deriving from a tube hole of the halloysite nanotubes and a second pore different from the first pore, and the Fe 2 O 3 content is not more than 2.00 mass %.

Claims (10)

1 . Halloysite powder that is powder comprising a granule in which halloysite including a halloysite nanotube is aggregated,

wherein the halloysite includes metahalloysite obtained by firing halloysite at a temperature not lower than 500° C.,

wherein the granule includes a first pore deriving from a tube hole of the halloysite nanotube, and a second pore different from the first pore,

wherein the halloysite powder comprises Fe 2 O 3 in an amount more than 0% and not more than 2.00 mass %, and

wherein the halloysite powder has a b value of not larger than 15.

2 . The halloysite powder according to claim 1 , wherein the Fe 2 O 3 content is not less than 0.10 mass % and not more than 2.00 mass %.

3 . The halloysite powder according to claim 2 , wherein a differential pore distribution determined from a nitrogen adsorption isotherm by BJH method exhibits two or more pore size peaks.

4 . The halloysite powder according to claim 1 , wherein the Fe 2 O 3 content is more than 0% and not more than 1.50 mass %.

5 . The halloysite powder according to claim 4 , wherein a differential pore distribution determined from a nitrogen adsorption isotherm by BJH method exhibits two or more pore size peaks.

6 . The halloysite powder according to claim 1 , wherein a differential pore distribution determined from a nitrogen adsorption isotherm by BJH method exhibits two or more pore size peaks.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 28, 2022
From: KONNAI, HIDEFUMI
To: JFE MINERAL COMPANY, LTD.
Reel/Frame 060654/0325 →
Priority Claims (1)
JP 2019-195020 · Oct 28, 2019 · national
Continuity (1)
Related Publication 20220371903A1 · Nov 24, 2022
References Cited (56)
US 4098676A · Robson · 1978 [cited by applicant]
US 11180375B2 · Konnai · 2021 [cited by examiner]
US 20060102871A1 · Wang · 2006 [cited by examiner]
US 20070202061A1 · Riedlinger et al. · 2007 [cited by applicant]
US 20070292459A1 · Cooper · 2007 [cited by examiner]
US 20120107214A1 · Suh et al. · 2012 [cited by applicant]
US 20180305543A1 · Agrawal · 2018 [cited by examiner]
US 20200062603A1 · Konnai · 2020 [cited by examiner]
US 20200123025A1 · El-Masri · 2020 [cited by examiner]
CN 101795195A · 2010 [cited by applicant]
CN 101844773A · 2010 [cited by applicant]
CN 105789575A · 2016 [cited by applicant]
CN 107364872A · 2017 [cited by applicant]
EP 3530622A1 · 2019 [cited by examiner]
EP 3533761A1 · 2019 [cited by applicant]
JP H02004452A · 1990 [cited by applicant]
JP 2009091236A · 2009 [cited by applicant]
JP 2009513709A · 2009 [cited by applicant]
JP WO2018079556A1 · 2018 [cited by examiner]
KR 20190060793A · 2019 [cited by applicant]
WO WO2018079556A1 · 2018 [cited by examiner]
Development of nano modified concrete for next generation storage systems (Year: 2018). [cited by examiner]
Magnetic halloysite nanotubes iron oxide composites (Year: 2011). [cited by examiner]
International Search Report and Written Opinion for International Application No. PCT/JP2020/040095, dated Jan. 12, 2021, 7 pages. [cited by applicant]
Ouadaker et al., “Porous Granules by Freeze Granulation of Pickering Emulsions Stabilized with Halloysite Particles”, Colloids and Surfaces A, Oct. 31, 2019, vol. 585, 10 pages. [cited by applicant]
Wilson, I., “Kaolin and Halloysite Deposits of China”, Clay Minerals, 2004, vol. 39, pp. 1-15. [cited by applicant]
Ouyang, J., et al., “High Morphological Stability and Structural Transition of Halloysite (Hunan, China), in Heat Treatment”, Applied Clay Science, Elsevier, Amsterdam, NL, vol. 101, Sep. 16, 2014, pp. 16-22, XP02907797… [cited by applicant]
Extended European Search Report for European Application No. 20880553.1, dated Feb. 8, 2023, 7 pages. [cited by applicant]
Chinese Office Action with Search Report for Chinese Application No. 202080074618.6, dated Jun. 1, 2023, 7 pages. [cited by applicant]
Japanese Office Action for Japanese Application No. 2021-553599, dated Jun. 6, 2023 with Concise Statement of Relevance of Office Action, 4 pages. [cited by applicant]
Li et al., “Coal-series kaolinite and deep processing technology”, China Building Materials Industry Press, 1st edition, 1st printing, (Jul. 2001), pp. 160-161 and its English translation. [cited by applicant]
Liu et al., “Testing methods and equipment for cement and raw fuel thereof”, China Building Materials Industry Press, 1st edition, 1st printing, (Jun. 2009), p. 478 and its English translation. [cited by applicant]
Office Action issued Aug. 28, 2024, by the State Intellectual Property Office of People's Republic of China in corresponding Chinese Patent Application No. 202080074618.6 and an English machine translation with Concise … [cited by applicant]
European Communication pursuant to Article 94(3) for European Application No. 20 880 553.1, dated May 6, 2024, 5 pages. [cited by applicant]
Korean Office Action for Korean Application No. 10-2022-7013307, dated Apr. 25, 2024 with Concise Statement of Relevance of Office Action, 5 pages. [cited by applicant]
Yuan et al., “Changes in structure, morphology, porosity, and surface activity of mesoporous halloysite nanotubes under heating”, Clays and Clay Minerals, (Dec. 1, 2012), vol. 60(6), pp. 561-573. [cited by applicant]
Notice of Allowance issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 16/344,650, mailed Sep. 20, 2021, U.S. Patent and Trademark Office, Alexandria, VA. (9 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 16/344,650, mailed Jan. 14, 2021, U.S. Patent and Trademark Office, Alexandria, VA. (7 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed Jan. 18, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (11 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,438, mailed Mar. 7, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (11 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed May 2, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (7 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed Jun. 20, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (10 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 16/344,650, mailed Jun. 25, 2020, U.S. Patent and Trademark Office, Alexandria, VA. (8 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,438, mailed Jul. 31, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (11 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,438, mailed Aug. 7, 2023, U.S. Patent and Trademark Office, Alexandria, VA. (8 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed Aug. 7, 2023, U.S. Patent and Trademark Office, Alexandria, VA. (8 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed Oct. 2, 2023, U.S. Patent and Trademark Office, Alexandria, VA. (13 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,438, mailed Oct. 3, 2023, U.S. Patent and Trademark Office, Alexandria, VA. (13 pages). [cited by applicant]
Office Action issued by the U.S. Patent and Trademark Office in the U.S. Appl. No. 17/049,443, mailed Oct. 18, 2024, U.S. Patent and Trademark Office, Alexandria, VA. (11 pages). [cited by applicant]
Liu et al., “Recent Advance in Research on Halloysite Nanotubes-Polymemanocomposite”, Progress in Polymer Science, (Aug. 2014), vol. 39, Issue 8, pp. 1498-1525. [cited by applicant]
Tan et al., “Natural Halloysite Nanotubes as Mesoporous Carriers for the Loading of Ibuprofen”, Microporous and Mesoporous Materials, (Sep. 2013), vol. 179, pp. 89-98. [cited by applicant]
Zhang et al., “Metal Oxide Nanoparticles Deposited Onto Carbon-Coated Halloysite Nanotubes”, Applied Clay Science, (Jun. 2014), vol. 95, pp. 252-259. [cited by applicant]
Zivica et al., “High Strength Metahalloysite Based Geopolymer”, Composites: Part B, (Feb. 2014), vol. 57, pp. 155-165. [cited by applicant]
Matusik et al., “Surface Area and Porosity of Nanotubes Obtained from Kaolin Minerals of Different Structural Order”, Clays and Clay Minerals, (Apr. 2011), vol. 59, No. 2, pp. 116-135. [cited by applicant]
Pasbakhsh et al., “Characterisation of Properties of Various Halloysites Relevant to their use as Nanotubes and Microfibre Fillers”, Applied Clay Science, (Apr. 2013), vol. 74, pp. 47-57. [cited by applicant]
Office Action (Notice of Final Rejection) issued Oct. 18, 2024, by the Korean Intellectual Property Office in corresponding Korean Patent Application No. 10-2022-7013307 and an English translation with the Concise State… [cited by applicant]