US2820813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of esters of hydroxy compounds
Assignee: Shell Development Co
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Filing: 1954-12-30
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Granted: 1958-01-21
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:32
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/22; C07C69/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR COUPLING AN ALPHA-PEROXY CYCLIC ETHER HAVING 4 TO 18 CARBON ATOMS AND NOT MORE THAN TWO OXYGEN ATOMS IN THE RING AND AN ETHYLENIC COMPOUND WHICH COMPRISES CONTACTING SAID ALPHA-PEROXY CYCLIC ETHER WITH AN ETHYLENIC COMPOUND FREE FROM GROUPS MORE REACTIVE THAN THE ETHYLENIC UNSATURATION IN THE PRESENCE OF A REDOX REDUCING AGENT.
Claim 2
Dependent Claim
56 words
A PROCESS FOR COUPLING AN ALPHA-PEROXY CYCLIC ETHER HAVING 4 TO 18 CARBON ATOMS AND NOT MORE THAN TWO OXYGEN ATOMS IN THE RING AND AN ETHYLENIC COMPOUND WHICH COMPRISES CONTACTING SAID ALPHA-PEROXY CYCLIC ETHER WITH AN ETHYLENIC COMPOUND FREE FROM GROUPS MORE REACTIVE THAN THE ETHYLENIC UNSATURATION IN THE PRESENCE OF A REDOX REDUCING AGENT.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |