US3776860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reforming catalyst
Assignee: Citgo Petroleum Corp
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Filing: 1971-07-30
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Granted: 1973-12-04
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Expires: 1991-07-30
Abstract
Abstract AN IMPROVED REFORMING CATALYST IS DISCLOSED COMPRISING AN ALUMINA SUPPORT IMPREGNATED WITH PLATINUM, RHENIUM AND A RARE EARTH METAL. PREFERABLY THE CATALYST COMPOSITION COMPRISES PLATINUM, RHENIUM AND RARE EARTH METALS SUCH AS NEODYMIUM (ND), PRASEODYMIUM (PR), SAMARIUM (SM) AND YTTERBIUM (YB) EACH IN AMOUNTS OF FROM 0.1% TO 5% WEIGHT.
Inventors
- 👤 C Rai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:24
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |