US2522407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cxchzoh
Assignee: —
•
Filing: —
•
Granted: 1950-09-12
•
Expires: 1967-09-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:18
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D213/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
METHOD FOR THE PRODUCTION OF PHYSIOLOGICALLY ACTIVE DERIVATIVES OF PYRIDOXINE OF THE GROUP CONSISTING OF 2-METHYL-3-HYDROXY-4-AMINOMETHYL-5HYDROXYMETHYLPYRIDINE AND ESTERS THEREOF, WHICH COMPRISES REACTING WITH AMMONIA UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 100*C. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYRIDOXINE AND ESTERS THEREOF.
Claim 2
Dependent Claim
46 words
METHOD FOR THE PRODUCTION OF PHYSIOLOGICALLY ACTIVE DERIVATIVES OF PYRIDOXINE OF THE GROUP CONSISTING OF 2-METHYL-3-HYDROXY-4-AMINOMETHYL-5HYDROXYMETHYLPYRIDINE AND ESTERS THEREOF, WHICH COMPRISES REACTING WITH AMMONIA UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 100*C. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYRIDOXINE AND ESTERS THEREOF.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |