US2888096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal centrifugal separator
Assignee: Shell Development Co
•
Filing: 1955-06-22
•
Granted: 1959-05-26
•
Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Harry D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:10
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US4069A
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US474490A
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US1838117A
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US1953948A
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US2103809A
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US2170704A
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US2323405A
Cited
US2322414A
Cited
CH255948A
Cited
US2672871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |