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US2886574A
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Quaternary ammonium salts of 2, 2-diphenyl-4, 4-dimethyl-4-pyrrolidino-butyramide
Assignee: Pharmacia and Upjohn Co
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Filing: 1956-11-19
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Granted: 1959-05-12
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Expires: 1976-11-19
Abstract
No abstract record available.
Inventors
- 👤 Brooke D Aspergren
- 👤 Robert B Moffett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:21
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
2,2 - DIPHENYL - 4,4 - DIMETHYL - 4 - PYRROLIDINOBUTYRAMIDE LOWER-ALKYL QUATERNARY AMMONIUM SALTS.
References Cited (Backward Citations)
US2782206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |