Patent US2719631A successfully refreshed from Google Patents.
US2719631A
Expired / Lapsed
US
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Methods of and devices for effecting centrifugal separation
Assignee: Individual
•
Filing: 1952-02-04
•
Granted: 1955-10-04
•
Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Vicard Pierre Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:07
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/12; B04C5/13; Y; Y10; Y10S; Y10S55/00; Y10S55/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1029214A
Cited
GB190929889A
Cited
US1152125A
Cited
US1753490A
Cited
GB330163A
Cited
US2153270A
Cited
US2343682A
Cited
US2360595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |