US2659693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing corrosion of ferrous metals
Assignee: Standard Oil Development Co
•
Filing: 1952-05-10
•
Granted: 1953-11-17
•
Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Melba L Lytle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:19
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR PREVENTING THE CORROSION OF FERROUS METALS EXPOSED TO A CORROSIVE SOLUTION WHICH COMPRISES INCORPORATING IN SAID CORROSIVE SOLUTION AN EFFECTIVE AMOUNT OF A DOUBLE, LONGCHAIN QUATERNARY AMMONIUM SALT REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
35 words
A PROCESS FOR PREVENTING THE CORROSION OF FERROUS METALS EXPOSED TO A CORROSIVE SOLUTION WHICH COMPRISES INCORPORATING IN SAID CORROSIVE SOLUTION AN EFFECTIVE AMOUNT OF A DOUBLE, LONGCHAIN QUATERNARY AMMONIUM SALT REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2460259A
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US2596273A
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US2525778A
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US2525777A
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US2525779A
Cited
US2598213A
Cited
US2583399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |