US3225065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diester compositions formed by the reaction of pyromellitic dianhydride and polyhydric alcohols
Assignee: EIDP Inc
•
Filing: 1959-09-16
•
Granted: 1965-12-21
•
Expires: 1979-09-16
Abstract
No abstract record available.
Inventors
- 👤 Hyde Thomas Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:17
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/14; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4223; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
THE FOLLOWING NEW COMPOUND:
Claim 2
Dependent Claim
4 words
THE FOLLOWING NEW COMPOUND:
References Cited (Backward Citations)
FR956583A
Cited
US2623056A
Cited
US2324483A
Cited
US2509855A
Cited
US2577706A
Cited
US2585323A
Cited
US2794811A
Cited
US2712543A
Cited
US2839495A
Cited
US2947717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |