Patent US3284446A successfully refreshed from Google Patents.
US3284446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ortho-(5-tetrazolyl) phenylpenicillins
Assignee: R&L Molecular Research Ltd
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Filing: 1964-11-24
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Granted: 1966-11-08
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Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond U Lemieux
- 👤 Howard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:51
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ACID OF THE FORMULA 2-(HOOC-),3,3,DI(CH3-),6-((2-(1H-TETRAZOL-5-YL),R1,R2,R3PHENYL)-CO-NH-)PENAM WHEREIN R1, R2 AND R3 EACH REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORO, CHLORO BROMO, IODO, TRIFLUOROMETHYL, (LOWER) ALKYL, (LOWER) ALKOXY, METHYLENEDIOXY, NITRO, METHYLSULFONYL AND (LOWER) ALKYLMERCAPTO; AND NONTOXIC PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF.
Claim 2
Dependent Claim
51 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ACID OF THE FORMULA 2-(HOOC-),3,3,DI(CH3-),6-((2-(1H-TETRAZOL-5-YL),R1,R2,R3PHENYL)-CO-NH-)PENAM WHEREIN R1, R2 AND R3 EACH REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORO, CHLORO BROMO, IODO, TRIFLUOROMETHYL, (LOWER) ALKYL, (LOWER) ALKOXY, METHYLENEDIOXY, NITRO, METHYLSULFONYL AND (LOWER) ALKYLMERCAPTO; AND NONTOXIC PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |