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Patent US2820031A successfully refreshed from Google Patents.
US2820031A
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Phenothiazinyl-alkanoic acid-alkyl amides
Assignee: Rhone Poulenc SA
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Filing: 1953-07-08
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Granted: 1958-01-14
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Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 Horclois Raymond Jacques
- 👤 Metivier Jean
- 👤 Suau Edonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
A PHENTHIAZINE DERIVATIVE OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2591679A
Cited
US2627517A
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US2485212A
Cited
US2576106A
Cited
US2615886A
Cited
BE519296A
Cited
BE519787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |