US2761870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy esters of polycarboxylic acids
Assignee: Shell Development Co
•
Filing: 1954-09-22
•
Granted: 1956-09-04
•
Expires: 1974-09-22
Abstract
No abstract record available.
Inventors
- 👤 George B Payne
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
ESTERS OF EPOXY-SUBSTITUTED HYDROCARBON ALCOHOLS HAVING AT LEAST ONE
Claim 2
Dependent Claim
9 words
ESTERS OF EPOXY-SUBSTITUTED HYDROCARBON ALCOHOLS HAVING AT LEAST ONE
References Cited (Backward Citations)
US2524432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |