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Patent US3518296A successfully refreshed from Google Patents.
US3518296A
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US
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Process of preparation of alkyl cyclopentane diones and intermediates therefor
Assignee: Sanofi Aventis France
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Filing: 1964-04-22
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Granted: 1970-06-30
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert Bucourt
- 👤 Andre Pierdet
- 👤 Germain Costerousse
- 👤 Daniel Hainaut
- 👤 Robert Joly
- 👤 Julien Warnant
- 👤 Bernard Goffinet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2811558A
Cited
US2865962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |