US2860141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermediate for pyridoxine and process
Assignee: Pfizer Inc
•
Filing: 1957-05-15
•
Granted: 1958-11-11
•
Expires: 1977-05-15
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Larrabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:47
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07D213/84; C07D213/85
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF 2-METHYL-3-AMINO-6-CHLOROPYRIDINE-4,5 - DICARBOXYLIC ACID AND THE SALTS THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |