US2801249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alpha-phenyl succinimides
Assignee: Parke Davis and Co LLC
•
Filing: 1955-05-02
•
Granted: 1957-07-30
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Charles A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:04
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D207/408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS FOR THE PRODUCTION OF N-METHYL-A-PHENYLSUCCINIMIDE WHICH COMPRISES REACTING PHENYLMALEIC ANHYDRIDE WITH AT LEAST ON E EQUIVALENT OF METHYLAMINE AT A TEMPERATURE BELOW 45*C., SUBJECTING THE MONOMETHYLAMIDE OF PHENYLMALEIC ACID SO OBTAINED TO THE ACTION OF A REDUCING AGENT FOR ALIPHATIC DOUBLE BOND TO OBTAIN MONOMETHYLAMIDE OF PHENYLSUCCINIC ACID AS A REDUCTION PRODUCT AND HEATING THE RESULTANT REDUCTIN PRODUCT AT A TEMPERATURE ABOVE 100*C.
Claim 2
Dependent Claim
64 words
PROCESS FOR THE PRODUCTION OF N-METHYL-A-PHENYLSUCCINIMIDE WHICH COMPRISES REACTING PHENYLMALEIC ANHYDRIDE WITH AT LEAST ON E EQUIVALENT OF METHYLAMINE AT A TEMPERATURE BELOW 45*C., SUBJECTING THE MONOMETHYLAMIDE OF PHENYLMALEIC ACID SO OBTAINED TO THE ACTION OF A REDUCING AGENT FOR ALIPHATIC DOUBLE BOND TO OBTAIN MONOMETHYLAMIDE OF PHENYLSUCCINIC ACID AS A REDUCTION PRODUCT AND HEATING THE RESULTANT REDUCTIN PRODUCT AT A TEMPERATURE ABOVE 100*C.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |