US3537980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration at low temperatures of platinum-rhenium reforming catalysts
Assignee: Chevron USA Inc
•
Filing: 1969-03-12
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Granted: 1970-11-03
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Expires: 1989-03-12
Abstract
No abstract record available.
Inventors
- 👤 Harris E Kluksdahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J23/00; B01J23/90; B01J23/92; B01J23/96; B01J37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2641582A
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US2882241A
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US3030301A
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US3011967A
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US3296118A
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US3407135A
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US3415737A
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US3434960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |