Patent US3539495A successfully refreshed from Google Patents.
US3539495A
Expired / Lapsed
US
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Catalytic dewaxing
Assignee: Chevron USA Inc
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Filing: 1968-10-30
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Granted: 1970-11-10
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Expires: 1988-10-30
Abstract
No abstract record available.
Inventors
- 👤 Clark J Egan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567; C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/62; C10G65/00; C10G65/02; C10G65/04; C10G65/043
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |