US3822221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel hydroreforming catalysts
Assignee: Compagnie Francaise de Raffinage SA
•
Filing: 1972-03-15
•
Granted: 1974-07-02
•
Expires: 1992-03-15
Abstract
Abstract NOVEL CATALYSTS SUITABLE FOR HYDROREFINING COMPRISING OF ALUMINA, TIN OR LEAD AND PLATINUM AND IRIDIUM; A CATALYST OF ALUMINA, ON WHICH TIN METAL IN A PARTICULAR MANNER HAS BEEN FIRST DEPOSITED AND THEREAFTER PLATINUM HAS BEEN DEPOSITED THEREON, IS ESPECIALLY ADVANTAGEOUS.
Inventors
- 👤 J Weisang
- 👤 P Engelhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:48
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; B01J23/626; B01J35/00; B01J35/60; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/64; B01J35/647
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |