US2590841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fykidoxin
Assignee: —
•
Filing: —
•
Granted: 1952-04-01
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:33
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D213/66; C07D213/67
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS WHICH COMPRISES REDUCING A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2-METHYL-3-HYDROXY-4,5-DICARBALKOXY-PYRIDINE, 2-METHYL-3-ALKOXY-4,5-DICARBALKOXY-PYRIDINE, AND 2METHYL-3-BENZYLOXY-4,5-DICARBALKOXY-PYRIDINE WITH LITHIUM ALUMINUM HYDRIDE TO PRODUCE THE CORRESPONDING 4,5-DI-(HYDROXYMETHYL)-PYRIDINE.
Claim 2
Dependent Claim
26 words
A PROCESS WHICH COMPRISES REDUCING A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2-METHYL-3-HYDROXY-4,5-DICARBALKOXY-PYRIDINE, 2-METHYL-3-ALKOXY-4,5-DICARBALKOXY-PYRIDINE, AND 2METHYL-3-BENZYLOXY-4,5-DICARBALKOXY-PYRIDINE WITH LITHIUM ALUMINUM HYDRIDE TO PRODUCE THE CORRESPONDING 4,5-DI-(HYDROXYMETHYL)-PYRIDINE.
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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |