US2870170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of epoxy-substituted polycarboxylic acids and epoxy-substituted alcohols
Assignee: Shell Development Co
•
Filing: 1953-12-08
•
Granted: 1959-01-20
•
Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 George B Payne
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
AN ESTER OF AN OPEN CHAIN ALIPHATIC ETHYLENICALLY UNSATURATED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |