US2624740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing alpha-acetopyridines
Assignee: GAF Chemicals Corp
•
Filing: 1951-06-01
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Granted: 1953-01-06
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Expires: 1971-06-01
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Hesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/44; C07D213/46; C07D213/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF PREPARING A-ACETOPYRIDINES CHARACTERIZED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
10 words
THE PROCESS OF PREPARING A-ACETOPYRIDINES CHARACTERIZED BY THE FOLLOWING 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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |