US3238183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic poly-1, 3, 4-oxadiazoles and process of making same
Assignee: EIDP Inc
•
Filing: 1963-01-28
•
Granted: 1966-03-01
•
Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Frazer August Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:46
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN AROMATIC POLYOXADIAZOLE CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
15 words
AN AROMATIC POLYOXADIAZOLE CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS SELECTED FROM THE CLASS CONSISTING OF
References Cited (Backward Citations)
US2395642A
Cited
US2404717A
Cited
US2476968A
Cited
US2512631A
Cited
US2512891A
Cited
US2615862A
Cited
US2765304A
Cited
US2816897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |