US2551674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of beta-phenylpropionic acid
Assignee: Phillips Petroleum Co
•
Filing: 1949-08-22
•
Granted: 1951-05-08
•
Expires: 1969-08-22
Abstract
No abstract record available.
Inventors
- 👤 John C Hillyer
- 👤 James T Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:28
CPC Classifications
C; C07; C07C; C07C51/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE MANUFACTURE OF BETA-PHENYLPROPIONIC ACID FROM A LACTONE HAVING THE EMPIRICAL FORMULA C9H12O3 AND PREPARED BY THE CONDENSATION OF 1,3-BUTADIENE WITH WATER AND FURFURAL, COMPRISING ADMIXING SAID LACTONE WITH A DEHYDRATING AGENT AND HEATING THE RESULTING ADMIXTURE AT A TEMPERATURE WITHIN THE LIMITS OF 150-400* F. FOR A PERIOD WITHIN THE LIMITS OF FROM 2-40 HOURS, AND RECOVERING BETA-PHENYLPROPIONIC ACID FROM THE RESULTING REACTION MIXTURE AS A PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE MANUFACTURE OF BETA-PHENYLPROPIONIC ACID FROM A LACTONE HAVING THE EMPIRICAL FORMULA C9H12O3 AND PREPARED BY THE CONDENSATION OF 1,3-BUTADIENE WITH WATER AND FURFURAL, COMPRISING ADMIXING SAID LACTONE WITH A DEHYDRATING AGENT AND HEATING THE RESULTING ADMIXTURE AT A TEMPERATURE WITHIN THE LIMITS OF 150-400* F. FOR A PERIOD WITHIN THE LIMITS OF FROM 2-40 HOURS, AND RECOVERING BETA-PHENYLPROPIONIC ACID FROM THE RESULTING REACTION MIXTURE AS A PRODUCT OF THE PROCESS.
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |