Patent US4584119A successfully refreshed from Google Patents.
US4584119A
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US
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Naphthalene dicarboxylic acid salts as corrosion inhibitors
Assignee: Texaco Inc
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Filing: 1985-04-19
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Granted: 1986-04-22
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Expires: 2005-04-19
Abstract
Abstract A corrosion inhibited antifreeze composition incorporating a corrosion inhibitor is described. The dibasic salt of naphthalene dicarboxylic acid and optionally a triazole comprise the corrosion inhibitor.
Inventors
- 👤 Roger G. Duranleau
- 👤 Carol A. Triebel
- 👤 Clifford L. Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:04
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/124
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
45 words
A corrosion inhibited antifreeze composition comprising a water-soluble liquid alcohol freezing point depressant and an effective amount of an inhibitor comprising: a dibasic acid salt selected from the group consisting of the alkali metal salts of 2,6-naphthalene dicarboxylic acid; 1,5-naphthalene dicarboxylic acid and mixtures thereof.
Claim 2
Dependent Claim
45 words
A corrosion inhibited antifreeze composition comprising a water-soluble liquid alcohol freezing point depressant and an effective amount of an inhibitor comprising: a dibasic acid salt selected from the group consisting of the alkali metal salts of 2,6-naphthalene dicarboxylic acid; 1,5-naphthalene dicarboxylic acid and mixtures thereof.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the inhibitor additionally comprises a triazole.
Claim 4
Dependent Claim
33 words
The composition of claim 2 wherein the dibasic acid salt is in an amount of 2 to 5 wt % and the triazole is in an amount of 0.1 to 1.0 wt %.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the alkali metal is selected from the group consisting of sodium, potassium and lithium.
Claim 6
Dependent Claim
23 words
The composition of claim 1 wherein the composition additionally comprises a compound selected from the group consisting of tolyltriazole, benzotriazole and sodium mercaptobenzothiazole.
Claim 7
Dependent Claim
15 words
The composition of claim 1 wherein the liquid alcohol freezing point depressant is ethylene glycol.
Claim 8
Dependent Claim
9 words
The composition of claim 1 which additionally comprises water.
Claim 9
Dependent Claim
44 words
A corrosion inhibited antifreeze composition comprising a water-soluble liquid alcohol freezing point depressant and an effective amount of an inhibitor comprising: a dibasic acid salt selected from the group consisting of the amine salts of 2,6-naphthalene dicarboxylic acid; 1,5-naphthalene dicarboxylic acid and mixtures thereof.
Claim 10
Dependent Claim
44 words
A corrosion inhibited antifreeze composition comprising a water-soluble liquid alcohol freezing point depressant and an effective amount of an inhibitor comprising: a dibasic acid salt selected from the group consisting of the amine salts of 2,6-naphthalene dicarboxylic acid; 1,5-naphthalene dicarboxylic acid and mixtures thereof.
Claim 11
Dependent Claim
12 words
The composition of claim 8 wherein the inhibitor additionally comprises a triazole.
Claim 12
Dependent Claim
33 words
The composition of claim 9 wherein the dibasic acid salt is in an amount of 2 to 5 wt % and the triazole is in an amount of 0.1 to 1.0 wt %.
Claim 13
Dependent Claim
10 words
The composition of claim 8 wherein the amine is triethanolamine.
Claim 14
Dependent Claim
23 words
The composition of claim 8 wherein the composition additionally comprises a compound selected from the group consisting of tolyltriazole, benzotriazole and sodium mercaptobenzothiazole.
Claim 15
Dependent Claim
15 words
The composition of claim 8 wherein the liquid alcohol freezing point depressant is ethylene glycol.
Claim 16
Dependent Claim
9 words
The composition of claim 8 which additionally comprises water.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |