Patent US964695A successfully refreshed from Google Patents.
Patent US3654128A successfully refreshed from Google Patents.
US3654128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewaxing of lubricating oils
Assignee: Texaco Inc
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Filing: 1969-12-24
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Granted: 1972-04-04
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Expires: 1989-12-24
Abstract
Abstract LUBRICATING OIL DISTILLATES CONTAINING BOTH PARAFFIN WAX AND MICROYCRYSTALLINE EAX, ARE DEWAXED IN A PROCESS COMBINING CATALYTIC HYDRODEWAXING AND CENTRIFUGE DEWAXING.
Inventors
- 👤 Robert A Woodle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:50
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G2400/00; C10G2400/10
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |