US3778417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-imide composition containing p-toluene sulfonic acid as stripping agent
Assignee: Standard Oil Co
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Filing: 1972-04-07
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Granted: 1973-12-11
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Expires: 1992-04-07
Abstract
Abstract POLYAMIDE-IMIDE COMPOSITIONS USEFUL FOR FILM PREPARATION ARE DISCLOSED. THESE COMPOSITIONS COMPRISE THE POLYAMIDE-IMIDE POLYMER, A SOLVENT SYSTEM FOR SAID POLYMER, AND ONE OF THE FOLLOWING STRIPPING AGENTS: PHOSPHORIC ACID, PHOSPHITES, ESTERS OF PHOSPHORIC ACID AND STRONG ORGANIC ACIDS.
Inventors
- 👤 C Serres
- 👤 B Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:54
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |