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US3457263A
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US
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Purine compounds
Assignee: EN NOM COLLECTIF DITE SCIENCE UNION ET CIE SOC FRANCAISE DE RECHERCHE MEDICALE SOC
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Filing: 1967-12-29
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Granted: 1969-07-22
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Expires: 1987-12-29
Abstract
No abstract record available.
Inventors
- 👤 Gilbert Regnier
- 👤 Roger Canevari
- 👤 Jean-Claude Le Douarec
- 👤 Michel Laubie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:04
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/26; C07D473/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3331843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |