US2703322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of isonicotinyl hydrazine
Assignee: F Hoffmann La Roche AG
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Filing: 1951-03-17
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Granted: 1955-03-01
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Expires: 1971-03-17
Abstract
No abstract record available.
Inventors
- 👤 Fox Herman Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:51
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/81; C07D213/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
1-ISONICONTINYL-2-R-HYDRAZINES, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF A LOWER ALKYLIDENE, CYCLOHEXYLIDENE, FURFURYLIDENE, AND 2, 4, 6-TRIOXO-HEXAHYDRO-PYRIMIDYLIDENE RADICAL.
Claim 2
Dependent Claim
21 words
1-ISONICONTINYL-2-R-HYDRAZINES, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF A LOWER ALKYLIDENE, CYCLOHEXYLIDENE, FURFURYLIDENE, AND 2, 4, 6-TRIOXO-HEXAHYDRO-PYRIMIDYLIDENE RADICAL.
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) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |