US3272843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylene-bis
Assignee: Honeywell International Inc
•
Filing: 1961-02-01
•
Granted: 1966-09-13
•
Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Sydney M Spatz
- 👤 Russell I Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4223; C07; C07C; C07C51/00; C07C51/54; C07C51/567; C07C57/00; C07C57/30; C07C57/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
DIANHYDRIDE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
5 words
DIANHYDRIDE HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2135709A
Cited
US2319070A
Cited
US2692270A
Cited
US2768153A
Cited
US2938014A
Cited
US2965610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |