Patent US3454165A successfully refreshed from Google Patents.
US3454165A
Expired / Lapsed
US
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Apparatus for the separation of viscous components from a liquid
Assignee: Shell USA Inc
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Filing: 1967-12-21
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Granted: 1969-07-08
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Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Jan Cornelissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:12
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/28; B01D21/283; B01D21/0039; B01D21/0045; B01D21/0063; B01D21/02; B01D21/04; B01D21/06; B01D21/24; B01D21/2427
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |