Patent US2898336A successfully refreshed from Google Patents.
US2898336A
Expired / Lapsed
US
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Phenthiazine derivatives
Assignee: Rhone Poulenc SA
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Filing: 1958-03-24
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Granted: 1959-08-04
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Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Gailliot Paul
- 👤 Debarre Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:29
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/24; C07D279/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A MEMBER OF THE CLASS CONSISTING OF A PHENTHIAZINE DERIVATIVE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
14 words
A MEMBER OF THE CLASS CONSISTING OF A PHENTHIAZINE DERIVATIVE OF 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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |