US2940982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy beta-lactones
Assignee: Shell USA Inc
•
Filing: 1958-04-14
•
Granted: 1960-06-14
•
Expires: 1978-04-14
Abstract
No abstract record available.
Inventors
- 👤 William J Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:24
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/02; C07D407/04; C07D407/06; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/145; C08G59/18; C08G59/20; C08G59/32; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE EPOXY BETA-LACTONE HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
THE EPOXY BETA-LACTONE HAVING THE FORMULA
References Cited (Backward Citations)
CA500661A
Cited
US2786068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |