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Patent US4675158A successfully refreshed from Google Patents.
US4675158A
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US
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Mercaptobenzothiazole and tolyltriazole corrosion inhibiting compositions
Assignee: ECC SPECIALTY CHEMICALS Inc
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Filing: 1985-07-30
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Granted: 1987-06-23
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Expires: 2005-07-30
Abstract
Abstract The present invention is directed to a composition which is useful for inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system which comprises mercaptobenzothiazole and tolyltriazole. The present invention is also directed to a method of inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system comprising maintaining in the aqueous system at least about 0.1 ppm (parts per million) of a composition comprising mercaptobenzothiazole and tolyltriazole.
Inventors
- 👤 William M. Klindera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:45
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/60; B01J29/61; B01J29/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
47 words
A composition useful for inhibiting corrosion of copper and copper alloys in contact with an aqueous system, which consists of mercaptobenzothiazole and tolyltriazole, wherein the ratio of mercaptobenzothiazole to tolyltriazole is about 1:1, by weight, and wherein said aqueous system is at a pH of about 7.0.
Claim 2
Dependent Claim
47 words
A composition useful for inhibiting corrosion of copper and copper alloys in contact with an aqueous system, which consists of mercaptobenzothiazole and tolyltriazole, wherein the ratio of mercaptobenzothiazole to tolyltriazole is about 1:1, by weight, and wherein said aqueous system is at a pH of about 7.0.
Claim 3
Independent Claim
71 words
A method of inhibiting corrosion of copper and copper alloys in contact with an aqueous system, comprising maintaining in said aqueous system at least about 0.1 ppm of a composition consisting of mercaptobenzothiazole and tolyltriazole, wherein the ratio of mercaptobenzothiazole to tolyltriazole is about 1:1, by weight, wherein said aqueous system is at a pH of about 7.0 and wherein said aqueous system contains less than 500 ppm Cl - .
Claim 4
Independent Claim
71 words
A method of inhibiting corrosion of copper and copper alloys in contact with an aqueous system, comprising maintaining in said aqueous system at least about 0.1 ppm of a composition consisting of mercaptobenzothiazole and tolyltriazole, wherein the ratio of mercaptobenzothiazole to tolyltriazole is about 1:1, by weight, wherein said aqueous system is at a pH of about 7.0 and wherein said aqueous system contains less than 500 ppm Cl - .
Claim 5
Dependent Claim
19 words
The method of claim 2, wherein about 0.5 to 100 ppm of said composition is maintained in said system.
Claim 6
Dependent Claim
19 words
The method of claim 2, wherein about 1.0 to 10 ppm of said composition is maintained in said system.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |