US3535231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst body consisting of physical mixture of different catalysts,one of which comprises rhenium
Assignee: Chevron USA Inc
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Filing: 1968-10-24
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Granted: 1970-10-20
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Expires: 1988-10-24
Abstract
No abstract record available.
Inventors
- 👤 James R Kittrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:16
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/04; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8896; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; C10G65/00; C10G65/02; C10G65/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |