US2723799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separation
Assignee: Sharples Corp
•
Filing: 1951-02-03
•
Granted: 1955-11-15
•
Expires: 1971-02-03
Abstract
No abstract record available.
Inventors
- 👤 Laurence P Sharples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:07
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321353A
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US1921181A
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US2023762A
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US2200202A
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US2286354A
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US2302382A
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US2614110A
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FR979279A
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US2521347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |