US2826562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy-substituted unsaturated esters prepared from polyepoxides and derivatives thereof
Assignee: Shell Development Co
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Filing: 1953-09-28
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Granted: 1958-03-11
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:13
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A HYDROXY-SUBSTITUTED UNSATURATED ESTER OBTAINED BY REACTING AT TEMPERATURE BETWEEN ROOM TEMPERATURE AND ABOUT 150*C. A POLYEPOXIDE HAVING MORE THAN ONE
Claim 2
Dependent Claim
21 words
A HYDROXY-SUBSTITUTED UNSATURATED ESTER OBTAINED BY REACTING AT TEMPERATURE BETWEEN ROOM TEMPERATURE AND ABOUT 150*C. A POLYEPOXIDE HAVING MORE THAN ONE
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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |