Patent US3909447A successfully refreshed from Google Patents.
US3909447A
Expired / Lapsed
US
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Mixtures of thiophosphates, oxygen phosphates and pyrophosphates
Assignee: Baker Petrolite LLC
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Filing: 1972-07-17
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Granted: 1975-09-30
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Expires: 1992-07-17
Abstract
Abstract Mixtures of Thiophosphates, pyrophosphates containing both oxygen and sulfur, and oxygen phosphates are effective as corrosion inhibitors particularly in aqueous and/or oxygenated systems. The mixtures are synergistically more effective as corrosion inhibitors than each component individually. These synergistic mixtures are also effective for other uses such as for scale preventatives, etc.
Inventors
- 👤 Derek Redmore
- 👤 Alfred E Woodson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:01
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C02F5/086; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/939
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
7 words
A COMPOSITION OF MIXTURE CONSISTING ESSENTIALLY OF
Claim 2
Dependent Claim
7 words
A COMPOSITION OF MIXTURE CONSISTING ESSENTIALLY OF
Claim 3
Dependent Claim
9 words
A MIXTURE OF DIFFERENT COMPOUNDS, EACH HAVING THE FORMULA
Claim 4
Dependent Claim
9 words
A MIXTURE OF DIFFERENT COMPOUNDS, EACH HAVING THE FORMULA
Claim 5
Dependent Claim
21 words
The composition of claim 1 where the weight ratio of I and II to III ranges from about 5:1 to 1:5.
Claim 6
Dependent Claim
21 words
The composition of claim 1 where the weight ratio of I and II to III ranges from about 3:1 to 1:3.
Claim 7
Dependent Claim
21 words
The composition of claim 3 where the weight ratio of I and II to III ranges from about 2:1 to 1:2.
Claim 8
Dependent Claim
10 words
The composition of claim 1 which also contains zinc ions.
Claim 9
Dependent Claim
26 words
The composition of claim 5 where said zinc is present in the amount of from about 1% to 40% by weight of I, II and III.
Claim 10
Dependent Claim
25 words
The composition of claim 5 where said zinc is present in the amount from about 0.5% to 50% by weight of I, II and III.
Claim 11
Dependent Claim
26 words
The composition of claim 5 where said zinc is present in the amount of from about 5% to 25% by weight of I, II and III.
Claim 12
Dependent Claim
11 words
A COMPOUND OR A MIXTURE OF COMPOUNDS, EACH HAVING THE FORMULA
Claim 13
Dependent Claim
11 words
A COMPOUND OR A MIXTURE OF COMPOUNDS, EACH HAVING THE FORMULA
Claim 14
Dependent Claim
11 words
A COMPOUND OR A MIXTURE OF COMPOUNDS EACH HAVING THE FORMULA
Claim 15
Dependent Claim
11 words
A COMPOUND OR A MIXTURE OF COMPOUNDS EACH HAVING THE FORMULA
References Cited (Backward Citations)
US2344395A
Cited
US2579038A
Cited
US2900222A
Cited
US2742369A
Cited
US3033889A
Cited
US3004056A
Cited
US3337654A
Cited
US3462365A
Cited
US3488289A
Cited
US3533943A
Cited
US3597352A
Cited
US3489682A
Cited
US3510436A
Cited
US3654170A
Cited
US3668138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |