US3021310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of cyclic esters
Assignee: UNION GARBIDE Corp
•
Filing: 1959-12-03
•
Granted: 1962-02-13
•
Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Cox
- 👤 Hostettler Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:34
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS WHICH COMPRISES CONTACTING A CYCLIC ESTER CHARACTERIZED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
13 words
A PROCESS WHICH COMPRISES CONTACTING A CYCLIC ESTER CHARACTERIZED BY THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2822348A
Cited
US2809958A
Cited
GB766347A
Cited
US2808390A
Cited
US2848441A
Cited
US2878236A
Cited
US2890208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |