IP Library Granted Patent US 9,029,308
Granted Patent B1
US 9,029,308 · App. 13/433,037 · Granted May 12, 2015

Low foam media cleaning detergent

Inventors: Soh Kian Koo (Bayan Lepas, MY); Kok Kin Yap (Sungai Petani, MY); EE Boon Quah (Penang, MY)
Assignee: WD Media, LLC
C11D11/0047
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Quick Facts
Patent No.
US 9,029,308
App. No.
13/433,037
Granted
May 12, 2015
Kind
B1
Abstract

A chemical composition for cleaning a medium is provided. For some embodiments, the chemical composition comprises a nonionic surfactant, an inorganic salt, a glycol compound, a chelating agent, and deionized water. For example, the chemical composition may comprise between about 1% and 5% of nonionic surfactant, between about 2% and 6% by weight of an inorganic salt, between about 5% and 10% by weight of a glycol compound, between about 5% and 10% by weight of a chelating agent, and deionized water.

Claims (15)

1. A chemical composition for cleaning a medium, the chemical composition comprising:

a nonionic surfactant having an ethoxylation level between about 5 to 20, wherein the nonionic surfactant comprises polyoxyethylene arylether and polyoxyethylene phenyl ether;

a medium etching component comprising an inorganic salt, the inorganic salt creating a pH of the chemical composition that is between about 12.0 to 12.5 at a temperature up to about 60 degrees Celsius;

a glycol compound;

a chelating agent; and

deionized water.

2. The chemical composition of claim 1 , wherein the polyoxyethylene arylether is about 1 to 5 wt. % of the chemical composition.

3. The chemical composition of claim 1 , wherein the polyoxyethylene phenyl ether is 1 to 5 wt. % of the chemical composition.

4. The chemical composition of claim 1 , wherein the inorganic salt comprises potassium hydroxide.

5. The chemical composition of claim 4 , wherein the potassium hydroxide is about 2 to 6 wt. % of the chemical composition.

6. The chemical composition of claim 1 , wherein the glycol compound comprises dipropylene glycol methyl ether.

7. The chemical composition of claim 6 , wherein the dipropylene glycol methyl ether is about 5 to 10 wt. % of the chemical composition.

8. The chemical composition of claim 1 , wherein the chelating agent comprises hydroxyethylene disphosphonic acid (HEDP).

9. The chemical composition of claim 8 , wherein the hydroxyethylene disphosphonic acid (HEDP) is about 5 to 10 wt. % of the chemical composition.

10. The chemical composition of claim 1 , wherein the medium is a magnetic medium.

Assignments (10)
PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 067045/0156 →
PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 064715/0001 →
RELEASE OF SECURITY INTEREST AT REEL 038710 FRAME 0383 Recorded Feb 8, 2022
From: JPMORGAN CHASE BANK, N.A.
To: WD MEDIA, LLC; WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 058965/0410 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 3, 2019
From: WD MEDIA, LLC
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 049084/0826 →
CHANGE OF NAME Recorded Sep 19, 2018
From: WD MEDIA, INC
To: WD MEDIA, LLC
Reel/Frame 047112/0758 →
RELEASE OF SECURITY INTEREST Recorded Mar 5, 2018
From: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: WD MEDIA, LLC
Reel/Frame 045501/0672 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WD MEDIA, LLC
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038710/0383 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WD MEDIA, LLC
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038709/0879 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WD MEDIA, LLC
To: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 038709/0931 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2012
From: KOO, SOH KIAN; YAP, KOK KIN; QUAH, EE BOON
To: WD MEDIA, INC.
Reel/Frame 027950/0952 →