Patent US2498179A successfully refreshed from Google Patents.
US3684450A
Expired / Lapsed
US
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Automatic apparatus and method for determining the packed cell volume of whole blood
Assignee: Individual
•
Filing: 1970-09-14
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Granted: 1972-08-15
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Expires: 1990-09-14
Abstract
Abstract AN AUTOMATIC APPARATUS FOR DETERMINING THE HEMATOCRIT OF BLOOD SAMPLES PROVIDES FOR THE SEAL LOADING OF BLOOD SAMPLES IN A SAME CAPILLARY CHAMBER DEFINED IN A CONTINUOUSLY ROTATING CENTRIFUGE HEAD, AND FOR PASSING WASH FLUID THROUGH SUCH CHAMBER BEFORE EACH LOADING-PACKING PHASE. THE BLOOD SAMPLES AND WASH FLUID ARE INTRODUCED SUCCESSIVELY INTO A CENTRAL WELL DEFINED IN THE CENTRIFUGE HEAD, AND CENTRIFUGALLY FORCED INTO THE CAPILLARY CHAMBER. A VALVING ARRANGEMENT OPERATES TO SEAL AND UNSEAL THE OUTER EXTREMITY OF THE CAPILLARY CHAMBER DURING THE LOADINGPACKING PHASE AND THE DISCHAGE-WASH PHASE, RESPECTIVELY, OF EACH CYCLE.
Inventors
- 👤 Stanford L Adler
- 👤 Kai Klemm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:51
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N15/042; B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; G01N2015/045; G01N2015/047; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/111666; Y10T436/117497; Y10T436/118339
Claims Analysis
Total Claims: 0
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |