US2739981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamines and salts thereof
Assignee: Wyeth LLC
•
Filing: 1952-08-26
•
Granted: 1956-03-27
•
Expires: 1972-08-26
Abstract
No abstract record available.
Inventors
- 👤 Szabo Joseph Lester
- 👤 William F Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:36
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE PROCESS COMPRISING REACTING AN ARALKYL HALIDE WITH AN ALKYLENE DIAMINE OF THE FORMULA
Claim 2
Dependent Claim
14 words
THE PROCESS COMPRISING REACTING AN ARALKYL HALIDE WITH AN ALKYLENE DIAMINE OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |