US2666053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-isonicotinyl-2, 2-disubstituted hydrazines
Assignee: F Hoffmann La Roche AG
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Filing: 1951-11-03
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Granted: 1954-01-12
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Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Fox Herman Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:11
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-ISONICOTINYL-2,2-DI-LOWER ALKYL HYDRAZINE, 1-ISONICOTINYL - 2,2 - DIPHENYLHYDRAZINE, 1-ISONICOTINYL-2,2-PENTAMETHYLENEHYDRAZINE, AND 1-ISONICOTINYL - 2,2 -(B,B'' -OXYDIETHYLENE) HYDRAZINE, AND THE ACID ADDITION SALTS THEREOF.
Claim 2
Dependent Claim
30 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-ISONICOTINYL-2,2-DI-LOWER ALKYL HYDRAZINE, 1-ISONICOTINYL - 2,2 - DIPHENYLHYDRAZINE, 1-ISONICOTINYL-2,2-PENTAMETHYLENEHYDRAZINE, AND 1-ISONICOTINYL - 2,2 -(B,B'' -OXYDIETHYLENE) HYDRAZINE, AND THE ACID ADDITION SALTS 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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |