US3607757A
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Corrosion resistant antifreeze compositions
Assignee: Stauffer Chemical Co
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Filing: 1968-07-24
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Granted: 1971-09-21
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Expires: 1988-07-24
Abstract
Abstract Corrosion resistant antifreeze compositions consisting essentially of at least one antifreeze fluid having from 1 to 4 carbons inclusive and from 1 to 3 hydroxy groups inclusive and a minor but effective amount sufficient to inhibit corrosion of an alkali metal dialkyl phosphate. The alkali metal dialkyl phosphate can be represented by the formula: D R A W I N G
Inventors
- 👤 Harold Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:00
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1673; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
The composition of claim 1 wherein the alkali metal dialkyl phosphate is present in an amount of from about 0.01% to about 5.0%
Claim 2
Dependent Claim
23 words
The composition of claim 1 wherein the alkali metal dialkyl phosphate is present in an amount of from about 0.1% to about 2.0%.
Claim 3
Dependent Claim
15 words
The composition of claim 3 wherein the alkali metal dialkyl phosphate is sodium didecyl phosphate.
Claim 4
Dependent Claim
15 words
The composition of claim 3 wherein the alkali metal dialkyl phosphate is sodium dioctyl phosphate.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the antifreeze fluid is a mixture of ethylene glycol, propylene glycol, and diethylene glycol.
Claim 6
Dependent Claim
11 words
A composition of claim 6 additionally containing a borax corrosion inhibitor.
Claim 7
Dependent Claim
28 words
A composition of claim 1 wherein the antifreeze fluid is a mixture of ethylene glycol, propylene glycol, and diethylene glycol and the phosphate inhibitor is sodium didecyl phosphate.
Claim 8
Dependent Claim
27 words
A corrosion resistant composition consisting essentially of water and a minor but effective amount sufficient to inhibit corrosion of an alkali metal dialkyl phosphate of the formula:
Claim 9
Dependent Claim
23 words
The composition of claim 9 wherein the alkali metal dialkyl phosphate is present in an amount of from about 0.10% to about 5%.
Claim 10
Dependent Claim
23 words
The composition of claim 9 wherein the alkali metal dialkyl phosphate is present in an amount of from about 0.1% to about 1%.
Claim 11
Dependent Claim
15 words
A composition of claim 1 wherein the alkali metal dialkyl phosphate is sodium didecyl phosphate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |