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Patent US2810725A successfully refreshed from Google Patents.
US2810725A
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Pyridoxal derivatives of isonicotinic acid hydrazide
Assignee: Olin Corp
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Filing: 1954-12-20
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Granted: 1957-10-22
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Bernstein Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:11
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/86; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF: COMPOUNDS FO THE GENERAL FORMULA
Claim 2
Dependent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF: COMPOUNDS FO THE GENERAL FORMULA
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |