US2590079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary butyl amines and their preparation
Assignee: Wyeth LLC
•
Filing: 1947-09-23
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Granted: 1952-03-25
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Expires: 1967-09-23
Abstract
No abstract record available.
Inventors
- 👤 Liese L Abell
- 👤 William F Bruce
- 👤 Seifter Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; C07C209/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE METHOD OF PREPARING AN N-ALKYL-OMEGAPHENYL TERTIARY-BUTYLAMINE COMPRISING ADDING A MIXTURE OF ISOBUTYROPHENONE AND A BENZYLATING AGENT HAVING THE FORMULA
Claim 2
Independent Claim
20 words
THE METHOD OF PREPARING AN N-ALKYL-OMEGAPHENYL TERTIARY-BUTYLAMINE COMPRISING ADDING A MIXTURE OF ISOBUTYROPHENONE AND A BENZYLATING AGENT HAVING THE FORMULA
References Cited (Backward Citations)
US2427887A
Cited
US2443206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |