US3148212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reductive alkylation process
Assignee: Wyeth Holdings LLC
•
Filing: 1961-12-22
•
Granted: 1964-09-08
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Boothe James Howard
- 👤 Petisi Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:11
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
THE PROCESS OF PREPARING COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
8 words
THE PROCESS OF PREPARING COMPOUNDS OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |