Patent US4631138A successfully refreshed from Google Patents.
US4631138A
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Corrosion inhibitors
Assignee: Baker Petrolite LLC
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Filing: 1985-02-07
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Granted: 1986-12-23
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Expires: 2005-02-07
Abstract
Abstract Triazones and triazine thiones are disclosed as corrosion inhibitors for ferrous metals.
Inventors
- 👤 Marshall E. Johns
- 👤 Keith D. Strassner
- 👤 Thomas G. Braga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; C09; C09K; C09K8/00; C09K8/54; C23F11/16; C23F11/162; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
Method of inhibiting corrosion of ferrous metals in oil and gas well drilling and production systems comprising adding to said systems an effective corrosion inhibiting amount of a composition comprising a solution, dispersion or emulsion of a compound selected from the group consisting of compounds represented by the formula ##STR5## wherein X represents oxygen or sulfur, R 1 and R 2 are the same or different and R 3 and R 5 are the same and represent hydrogen, alkyl, cycloalkyl, aryl, aralkyl, alkaryl and heterocyclyl, R 4 represents an organic radical, and the acid salts and quaternary ammonium salts thereof.
Claim 2
Dependent Claim
100 words
Method of inhibiting corrosion of ferrous metals in oil and gas well drilling and production systems comprising adding to said systems an effective corrosion inhibiting amount of a composition comprising a solution, dispersion or emulsion of a compound selected from the group consisting of compounds represented by the formula ##STR5## wherein X represents oxygen or sulfur, R 1 and R 2 are the same or different and R 3 and R 5 are the same and represent hydrogen, alkyl, cycloalkyl, aryl, aralkyl, alkaryl and heterocyclyl, R 4 represents an organic radical, and the acid salts and quaternary ammonium salts thereof.
Claim 3
Dependent Claim
8 words
Method of claim 1 wherein X represents oxygen.
Claim 4
Dependent Claim
23 words
Method of claim 1 wherein R 1 , R 2 , R 3 and R 5 represent hydrogen and R 4 represents alkyl.
Claim 5
Dependent Claim
23 words
Method of claim 1 wherein R 1 , R 2 , R 3 and R 5 represent hydrogen and R 4 represents hydroxyalkyl.
Claim 6
Dependent Claim
8 words
Method of claim 1 wherein X represents sulfur.
Claim 7
Dependent Claim
23 words
Method of claim 5 wherein R 1 , R 2 , R 3 and R 5 represent hydrogen and R 4 represents alkyl.
Claim 8
Dependent Claim
23 words
Method of claim 5 wherein R 1 , R 2 , R 3 and R 5 represent hydrogen and R 4 represents hydroxyalkyl.
Claim 9
Dependent Claim
24 words
Method of claim 5 wherein R 1 , R 2 , R 3 and R 5 represent hydrogen and R 4 represents an ether.
Claim 10
Dependent Claim
10 words
Method of claim 6 wherein said compound is 2,2'bis(1,3,5-triazine-2(1H)thione-5-yl)diethyl amine.
Claim 11
Dependent Claim
9 words
Method of claim 6 wherein said compound is 5-(2-octadecyl)-1,3,5,-triazine-2(1H)thione.
Claim 12
Dependent Claim
9 words
Method of claim 7 wherein said compound is 5-(2-hydroxyethyl)-1,3,5,-triazine-2(1H)thione.
Claim 13
Dependent Claim
9 words
Method of claim 7 wherein said compound is 5-(2-hydroxypropyl)-1,3,5-triazine-2(1H)thione.
Claim 14
Dependent Claim
15 words
Method of claim 8 wherein said compound is 5(2-octyl, nonyl, decyl mixed ethers of n-propylamine)-1,3,5-triazine-2(1H)thione.
References Cited (Backward Citations)
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Cited
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |