US2884436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parasympathicolytically active alpha, alpha-diphenyl-gamma-dialkylaminobutyramide compounds and manufacture thereof
Assignee: Nederlandsche Combinatie voor Chemische Industrie NV
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Filing: 1955-08-03
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Granted: 1959-04-28
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Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Janssen Paul Adriaan Jan
- 👤 Jongh David Karel De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A METHOD COMPRISING REACTING AN ALPHA,ALPHA-DIPHENYL-GAMMA-ALKYL ISOPROPYLAMINO BUTYRAMIDE WITH AN ALKYL ESTER OF A MINERAL ACID TO FORM A QUATERNARY AMMONIUM SALT OF SAID BUTYRAMIDE CONTAINING A NON-TOXIC MINERAL ACID RADICAL AND RECOVERING SAID QUATERNARY AMMONIUM SALT, THE STEP OF EFFECTING THE REACTION AT A TEMPERATURE AT LEAST OF THE ORDER OF 110*C. TO 120*C. IN A CLOSED SYSTEM UNDER PRESSURE.
Claim 2
Dependent Claim
62 words
IN A METHOD COMPRISING REACTING AN ALPHA,ALPHA-DIPHENYL-GAMMA-ALKYL ISOPROPYLAMINO BUTYRAMIDE WITH AN ALKYL ESTER OF A MINERAL ACID TO FORM A QUATERNARY AMMONIUM SALT OF SAID BUTYRAMIDE CONTAINING A NON-TOXIC MINERAL ACID RADICAL AND RECOVERING SAID QUATERNARY AMMONIUM SALT, THE STEP OF EFFECTING THE REACTION AT A TEMPERATURE AT LEAST OF THE ORDER OF 110*C. TO 120*C. IN A CLOSED SYSTEM UNDER PRESSURE.
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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |