US3299100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of butyrolactones
Assignee: Gulf Oil Corp
•
Filing: 1963-11-20
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Granted: 1967-01-17
•
Expires: 1983-11-20
Abstract
No abstract record available.
Inventors
- 👤 Lee V Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D315/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF MANUFACTURING A-SUBSTITUTED-$-BUTYROLACTONES COMPRISING THE FOLLOWING STEPS: (A) REACTING AN ESTER OF A SUBSTITUTED MALONIC ACID WITH ETHYLENE OXIDE IN THE PRESENCE OF LESS THAN AN EQUIMOLAR QUANTITY OF SODIUM ALKOXIDE TO PRODUCE AN A-CARBALKOXY-A-SUBSTITUTED-$-BUTYROLACTONE. (B) REACTING THE SUBSTITUTED LACTONE PRODUCED IN STEP (A) IN A SOLUTION OF AN EFFECTIVE, BUT LESS THAN EQUIMOLAR QUANTITY OF SODIUM ALKOXIDE IN ETHANOL TO YIELD AN A-SUBSTITUTED-$-BUTYROLACTONE.
Claim 2
Independent Claim
66 words
A METHOD OF MANUFACTURING A-SUBSTITUTED-$-BUTYROLACTONES COMPRISING THE FOLLOWING STEPS: (A) REACTING AN ESTER OF A SUBSTITUTED MALONIC ACID WITH ETHYLENE OXIDE IN THE PRESENCE OF LESS THAN AN EQUIMOLAR QUANTITY OF SODIUM ALKOXIDE TO PRODUCE AN A-CARBALKOXY-A-SUBSTITUTED-$-BUTYROLACTONE. (B) REACTING THE SUBSTITUTED LACTONE PRODUCED IN STEP (A) IN A SOLUTION OF AN EFFECTIVE, BUT LESS THAN EQUIMOLAR QUANTITY OF SODIUM ALKOXIDE IN ETHANOL TO YIELD AN A-SUBSTITUTED-$-BUTYROLACTONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |