US3380933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous alumina products and method of manufacture
Assignee: Produits Chimiques Pechiney Saint Gobain
•
Filing: 1966-02-09
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Granted: 1968-04-30
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Expires: 1986-02-09
Abstract
No abstract record available.
Inventors
- 👤 Michel Max
- 👤 Courbon Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:17
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28054; B01J20/28069; B01J20/02; B01J20/06; B01J20/08; B01J20/10; B01J20/103; B01J20/28014; B01J20/28042; B01J20/28047; B01J20/28078; B01J20/28088; B01J20/28092; B01J35/00; B01J35/60; B01J35/63; B01J35/635; B01J35/64; B01J35/653; B01J35/66; B01J35/67
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3172866A
Cited
US2406420A
Cited
US2644799A
Cited
US2782144A
Cited
US2773842A
Cited
US2982719A
Cited
US3255027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |