US2569288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of n-benzyl-betahalopropionamides
Assignee: Wyeth Holdings LLC
•
Filing: 1949-09-24
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Granted: 1951-09-25
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Expires: 1969-09-24
Abstract
No abstract record available.
Inventors
- 👤 Robert T Cassell
- 👤 Kushner Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:27
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF PREPARING N-BENZYL-BETACHLOROPROPIONAMIDE WHICH COMPRISES MIXING TOGETHER BENZYLAMINE AND BETA-CHLOROPROPIONYL CHLORIDE IN WATER AT A TEMPERATURE WITHIN THE RANGE -15* C. TO 50* C. WHILE MAINTAINING THE HYDROGEN ION CONCENTRATION WITHIN THE RANGE PH 4 TO PH 9.
Claim 2
Independent Claim
40 words
THE METHOD OF PREPARING N-BENZYL-BETACHLOROPROPIONAMIDE WHICH COMPRISES MIXING TOGETHER BENZYLAMINE AND BETA-CHLOROPROPIONYL CHLORIDE IN WATER AT A TEMPERATURE WITHIN THE RANGE -15* C. TO 50* C. WHILE MAINTAINING THE HYDROGEN ION CONCENTRATION WITHIN THE RANGE PH 4 TO PH 9.
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |