US2597446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary butyl secondary amines and method for preparing the same
Assignee: Wyeth LLC
•
Filing: 1949-11-29
•
Granted: 1952-05-20
•
Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 William F Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
THE PROCESS OF FORMING SECONDARY AMINES COMPRISING REACTING ISOPROPYL MAGNESIUM HALIDE WITH A BENZALDEHYDE OF THE FORMULA
Claim 2
Dependent Claim
17 words
THE PROCESS OF FORMING SECONDARY AMINES COMPRISING REACTING ISOPROPYL MAGNESIUM HALIDE WITH A BENZALDEHYDE OF THE FORMULA
References Cited (Backward Citations)
DE274350C
Cited
US2344356A
Cited
US2309150A
Cited
US2309151A
Cited
US2378889A
Cited
US2457660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |