Patent US3144831A successfully refreshed from Google Patents.
US3144831A
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Fluid gradient engine
Assignee: Beckman Coulter Inc
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Filing: 1961-07-13
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Granted: 1964-08-18
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Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Edward G Pickels
- 👤 James H Bassham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:58
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/02; B01; B01F; B01F35/00; B01F35/80; B01F35/88; B01F35/882; F; F04; F04B; F04B13/00; F04B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FLUID GRADIENT ENGINE COMPRISING MEANS FOR PROVIDING A CONTINUOUS FLOW OF A COMPOSITE FLUID FROM A PLURALITY OF SOURCES, AND CONTROL MEANS CONNECTED TO ONE OF SAID SOURCES FOR CONTINUALLY VARYING THE OUTPUT THEREFROM TO SAID MEANS FOR PROVIDING A CONTINUOUS FLOW, AND MEANS CONNECTED TO SAID CONTROL MEANS FOR OPERATING THE CONTROL MEANS IN TIME SYNCHRONISM WITH SAID MEANS FOR PROVIDING A CONTINUOUS FLOW.
Claim 2
Dependent Claim
66 words
A FLUID GRADIENT ENGINE COMPRISING MEANS FOR PROVIDING A CONTINUOUS FLOW OF A COMPOSITE FLUID FROM A PLURALITY OF SOURCES, AND CONTROL MEANS CONNECTED TO ONE OF SAID SOURCES FOR CONTINUALLY VARYING THE OUTPUT THEREFROM TO SAID MEANS FOR PROVIDING A CONTINUOUS FLOW, AND MEANS CONNECTED TO SAID CONTROL MEANS FOR OPERATING THE CONTROL MEANS IN TIME SYNCHRONISM WITH SAID MEANS FOR PROVIDING A CONTINUOUS FLOW.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |