US3278557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lactones from keto esters
Assignee: Mobil Oil AS
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Filing: 1963-07-17
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Granted: 1966-10-11
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Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Chibnik Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
C; C07; C07D; C07D315/00; C07D309/00; C07D309/16; C07D309/28; C07D309/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING DELTA-LACTONES WHICH COMPRISES CONTACTING AN ESTER SELECTED FRM THE GROUP CONSISTING OF METHYL AND ETHYL ESTERS OF DELTA KETO-DELTA PHEENYL ALKANE CARBOXYLIC ACIDS, AND HYDROEN, WITH A HYDROGENATION CATALYST WHICH PROMOTES CONVERSION OF =C=O TO -CHOH, AT A TEMPERATURE OF BETWEEN ABOUT 210*F. AND ABOUT 450*F., AND AT A PRESSURE OF BETWEEN ABOUT 750 P.S.I. AND ABOUT 1500 P.S.I.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING DELTA-LACTONES WHICH COMPRISES CONTACTING AN ESTER SELECTED FRM THE GROUP CONSISTING OF METHYL AND ETHYL ESTERS OF DELTA KETO-DELTA PHEENYL ALKANE CARBOXYLIC ACIDS, AND HYDROEN, WITH A HYDROGENATION CATALYST WHICH PROMOTES CONVERSION OF =C=O TO -CHOH, AT A TEMPERATURE OF BETWEEN ABOUT 210*F. AND ABOUT 450*F., AND AT A PRESSURE OF BETWEEN ABOUT 750 P.S.I. AND ABOUT 1500 P.S.I.
Claim 3
Dependent Claim
6 words
A DELTA LACTONE HAVING THE FORMULA:
Claim 4
Dependent Claim
6 words
A DELTA LACTONE HAVING THE FORMULA:
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |