US3652644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of esters of salicylic acid as rust inhibitors
Assignee: Gulf Research and Development Co
•
Filing: 1968-04-01
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Granted: 1972-03-28
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Expires: 1988-04-01
Abstract
Abstract QUATERNARY AMMONIUM SALTS OF ESTERS OF SALICYLIC ACID ARE USED AS RUST INHIBITORS IN HYDROCARBON OIL.
Inventors
- 👤 Elizabeth L Fareri
- 👤 Robert J Mcguire
- 👤 Harold O Strange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:03
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222
Claims Analysis
Total Claims: 0
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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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |