Patent US3554902A successfully refreshed from Google Patents.
US3554902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platinum iridium
Assignee: Chevron USA Inc
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Filing: 1968-08-16
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Granted: 1971-01-12
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Expires: 1988-08-16
Abstract
Abstract REFORMING A NAPHTHA IN A REACTION ZONE IN THE PRESENCE OF HYDROGEN WITH A CATALYST COMPOSITION OF A POROUS SOLID CARRIER AND 0.01 TO 3 WEIGHT PERCENT PLATINUM AND 0.001 TO 1 WEIGHT PERCENT IRIDIUM, AND MAINTAINING WITHIN THE REACTION ZONE LSESS THAN ABOUT 15 P.P.M. SULFUR.
Inventors
- 👤 Waldeen C Buss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:06
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/468
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |