Patent US3682860A successfully refreshed from Google Patents.
US3682860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable polymers and method of their production
Assignee: Toray Industries Inc
•
Filing: 1970-02-26
•
Granted: 1972-08-08
•
Expires: 1990-02-26
Abstract
Abstract HEAT RESISTANT POLYAMIDEIMIDES WITH AN AMINE BOND TO IMIDE BOND RATIO OF 2:1.
Inventors
- 👤 Naoya Yoda
- 👤 Takashi Kubota
- 👤 Masaru Kuribara
- 👤 Noriaki Dokoshi
- 👤 Yoshi-I Toshiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:37
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3821; C08G73/00; C08G73/06; C08G73/10; C08G73/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |