Patent US3055890A successfully refreshed from Google Patents.
US3055890A
Expired / Lapsed
US
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Phenthiazine derivatives
Assignee: Rhone Poulenc SA
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Filing: 1959-01-14
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Granted: 1962-09-25
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Expires: 1979-01-14
Abstract
No abstract record available.
Inventors
- 👤 Jacob Robert Michel
- 👤 Horclois Raymond Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:18
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF PHENTHIAZINE DERIVATIVES OF THE FORMULA:
Claim 2
Dependent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF PHENTHIAZINE DERIVATIVES OF THE FORMULA:
References Cited (Backward Citations)
US2838507A
Cited
GB780193A
Cited
US2902485A
Cited
US2877224A
Cited
US2889322A
Cited
US2898336A
Cited
US2944054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |