Patent US3440272A successfully refreshed from Google Patents.
US3440272A
Expired / Lapsed
US
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Ni/silane catalyst in hydrogenation of organic compounds
Assignee: Rhone Poulenc SA
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Filing: 1965-05-17
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Granted: 1969-04-22
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Emile Eugene Frainnet
- 👤 Raymond Jean Calas
- 👤 Yves Colleuille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/10; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |