US2544904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridine compounds and method for their production
Assignee: F Hoffmann La Roche AG
•
Filing: 1946-10-01
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Granted: 1951-03-13
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Expires: 1966-10-01
Abstract
No abstract record available.
Inventors
- 👤 Steiger Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:04
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; C07D213/04; C07D213/60; C07D213/62; C07D213/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 3-PYRIDINE-THIOL, THE HYDROCHLORIDE OF 3-PYRIDINE-THIOL, THE HYDROCHLORIDE OF PYRIDINE-THIOL.
Claim 2
Dependent Claim
17 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 3-PYRIDINE-THIOL, THE HYDROCHLORIDE OF 3-PYRIDINE-THIOL, THE HYDROCHLORIDE OF PYRIDINE-THIOL.
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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |