US3703587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of poly-e ster-amide-acids as rust or corrosion inhibitors
Assignee: Baker Petrolite LLC
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Filing: 1971-06-07
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Granted: 1972-11-21
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Expires: 1991-06-07
Abstract
Abstract PROCESS OF INHIBITING CORROSION OF METALS AND ALLOYS IN CONTACT WITH CORROSIVE MEDIA COMPRISING CONTACTING SAID METALS AND ALLOYS WITH POLY-ESTER-AMIDE-ACIDS FORMED BY REACTING (1) AND ALKYL OR AN ALKENYL SUCCINIC ACID OR THE ANHYDRIDE THEREOF WITH (2) A POLYOL, THE PRODUCT OF WHICH IS REACTED WITH AN ALKANOL AMINE TO FORM AN ESTER-AMIDE AND THEN REACTING SO-FORMED ESTER-AMIDE WITH AN ALKYL OR AN ALKENYL SUCCINIC ACID OR THE ANHYDRIDE THEREOF.
Inventors
- 👤 Theodore Spanos
- 👤 Richard L Godar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:40
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |