Patent US3358840A successfully refreshed from Google Patents.
US3358840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless, helical fibre, filtration centrifuge
Assignee: Czech Academy of Sciences
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Filing: 1966-09-21
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Granted: 1967-12-19
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Expires: 1986-09-21
Abstract
No abstract record available.
Inventors
- 👤 Pinkava Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:22
CPC Classifications
B; B04; B04B; B04B3/00; B04B3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
CONTINUOUS FILTRATION CENTRIFUGE, COMPRISING; AN OUTER DRUM AND AN INNER DRUM INSERTED IN THE SAID OUTER DRUM; THE ENVELOPES OF THE SAID TWO DRUMS EACH COMPRISING A PLURALITY OF RIBS AND HAVING THEIR AXES ARRANGED WITH RESPECT TO EACH OTHER IN DIRECTIONS DIFFERENT FROM PARALLEL, AND THE RIBS OF EACH OF THE TWO ENVELOPES ARRANGED WITH RESPECT TO EACH OTHER SO THAT IF ONE OF THE TWO DRUMS IS ROTATED, THE OTHER IS ALSO ROTATED; A HOLLOW SHAFT ON SAID OUTER DRUM; A HOLLOW SHAFT ON SAID INNER DRUM MOUNTED IN THE SAID HOLLOW SHAFT OF THE SAID OUTER DRUM; A DEVICE WITH A MOTOR FOR DRIVING A CONTINUOUS FIBRE; A WINDING DEVICE WHICH GUIDES THE CONTINUOUS FIBRE FROM THE INNER SPACE OF THE SAID TWO DRUMS TO THE OUTSIDE THROUGH A TUBE AND OVER ROLLERS;
Claim 2
Dependent Claim
136 words
CONTINUOUS FILTRATION CENTRIFUGE, COMPRISING; AN OUTER DRUM AND AN INNER DRUM INSERTED IN THE SAID OUTER DRUM; THE ENVELOPES OF THE SAID TWO DRUMS EACH COMPRISING A PLURALITY OF RIBS AND HAVING THEIR AXES ARRANGED WITH RESPECT TO EACH OTHER IN DIRECTIONS DIFFERENT FROM PARALLEL, AND THE RIBS OF EACH OF THE TWO ENVELOPES ARRANGED WITH RESPECT TO EACH OTHER SO THAT IF ONE OF THE TWO DRUMS IS ROTATED, THE OTHER IS ALSO ROTATED; A HOLLOW SHAFT ON SAID OUTER DRUM; A HOLLOW SHAFT ON SAID INNER DRUM MOUNTED IN THE SAID HOLLOW SHAFT OF THE SAID OUTER DRUM; A DEVICE WITH A MOTOR FOR DRIVING A CONTINUOUS FIBRE; A WINDING DEVICE WHICH GUIDES THE CONTINUOUS FIBRE FROM THE INNER SPACE OF THE SAID TWO DRUMS TO THE OUTSIDE THROUGH A TUBE AND OVER ROLLERS;
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |