Patent US2887513A successfully refreshed from Google Patents.
US2887513A
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Acetophenetidine
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-08-23
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Granted: 1959-05-19
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Charles M Eaker
- 👤 Campbell John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:17
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A PROCESS FOR PREPARING ACETOPHENETIDINE, THE STEP COMPRISING ACETYLATING THE AMINO GROUP OF P-PHENETIDINE BY REACTING P-PHENETIDINE WITH ACETIC ANHYDRIDE IN A LIQUID HYDROCARBON MEDIUM, THE QUANTITY OF SAID LIQUID HYDROCARBON MEDIUM BEING WITHIN THE RANGE OF ABOUT 40 ML. TO ABOUT 65 ML. PER GRAM-MOL OF P-PHENETIDINE SUPPLIED TO THE REACTION MIXTURE, AND SAID LIQUID HYDROCARBON MEDIUM BEING FREE FROM OLEFINIC UNSATURATION AND BOILING WITHIN THE RANGE OF ABOUT 90* C. TO ABOUT 250* C.
Claim 2
Dependent Claim
77 words
IN A PROCESS FOR PREPARING ACETOPHENETIDINE, THE STEP COMPRISING ACETYLATING THE AMINO GROUP OF P-PHENETIDINE BY REACTING P-PHENETIDINE WITH ACETIC ANHYDRIDE IN A LIQUID HYDROCARBON MEDIUM, THE QUANTITY OF SAID LIQUID HYDROCARBON MEDIUM BEING WITHIN THE RANGE OF ABOUT 40 ML. TO ABOUT 65 ML. PER GRAM-MOL OF P-PHENETIDINE SUPPLIED TO THE REACTION MIXTURE, AND SAID LIQUID HYDROCARBON MEDIUM BEING FREE FROM OLEFINIC UNSATURATION AND BOILING WITHIN THE RANGE OF ABOUT 90* C. TO ABOUT 250* C.
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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |