Patent US1638078A successfully refreshed from Google Patents.
US3287325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel carbonyl amino substituted lactones and polymers thereof
Assignee: EIDP Inc
•
Filing: 1965-06-22
•
Granted: 1966-11-22
•
Expires: 1985-06-22
Abstract
No abstract record available.
Inventors
- 👤 Williams Meurig Wyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6852
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A COPOLYESTER HAVING BETWEEN ABOUT 90-99.5 MOL PERCENT OF THE FOLLOWING RECURRING STRUCTURAL UNIT
References Cited (Backward Citations)
US2777830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |