US2744912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-o. o-diphenylphosphonylamino-antipyrin and process for its production
Assignee: Rhone Poulenc SA
•
Filing: 1955-10-13
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Granted: 1956-05-08
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Expires: 1975-10-13
Abstract
No abstract record available.
Inventors
- 👤 Gailliot Paul
- 👤 Debarre Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6503; C07F9/65031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
4-O,O-DIPHENYLPHOSPHONYLAMINO-ANTIPYRIN OF THE FORMULA:
Claim 2
Dependent Claim
4 words
4-O,O-DIPHENYLPHOSPHONYLAMINO-ANTIPYRIN OF THE FORMULA:
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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |