Patent US2568635A successfully refreshed from Google Patents.
US2568635A
Expired / Lapsed
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Process for preparing alpha-beta unsaturated carboxylic acids
Assignee: Goodrich Corp
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Filing: 1950-03-22
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Granted: 1951-09-18
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Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Jansen Jacob Eden
- 👤 Warren L Beears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
C; C07; C07C; C07C57/00; C07C57/02; C07C57/03; C07C51/00; C07C51/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN A METHOD FOR PREPARING AN ALPHA-BETA UNSATURATED MONOCARBOXYLIC ACID BY PYROLYZING A POLYMER OF A BETA-LACTONE OF A MONOCARBOXYLIC ACID HAVING AT LEAST ONE UNSUBSTITUTED HYDROGEN ATOM ON ITS ALPHA CARBON ATOM AND CONTAININGE ONLY UNREACTIVE HYDROCARBON SUBSTITUENTS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE PYROLYSIS IN THE PRESENCE OF SUPERHEATED STEAM.
Claim 2
Dependent Claim
53 words
IN A METHOD FOR PREPARING AN ALPHA-BETA UNSATURATED MONOCARBOXYLIC ACID BY PYROLYZING A POLYMER OF A BETA-LACTONE OF A MONOCARBOXYLIC ACID HAVING AT LEAST ONE UNSUBSTITUTED HYDROGEN ATOM ON ITS ALPHA CARBON ATOM AND CONTAININGE ONLY UNREACTIVE HYDROCARBON SUBSTITUENTS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE PYROLYSIS IN THE PRESENCE OF SUPERHEATED STEAM.
References Cited (Backward Citations)
US2361036A
Cited
US2484067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |