US3662018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving the selectivity of dehydrogenation catalysts
Assignee: Texaco Inc
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Filing: 1970-05-15
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Granted: 1972-05-09
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Expires: 1990-05-15
Abstract
Abstract THIS INVENTION CONCERNS A PROCESS FOR IMPROVING THE SELECTIVITY OF NOBLE METAL-CONTAINING ZEOLITE CATALYST IN DEHYDROGENATION REACTIONS COMPRISING PRELIMINARILY CONTACTING THE CATALYST FOR AT LEAST 1, HOURS AT TEMPERATURES BETWEEN 675*F. AND 775*F. AND PREFERABLY AT SPACE VELOCITIES OF FROM ABOUT 2 TO 5.
Inventors
- 👤 Levi C Parker
- 👤 Charles A Senn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:33
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |