US2822315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of formed and fluid blood components
Assignee: Protein Foundation Inc
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Filing: 1952-04-12
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Granted: 1958-02-04
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Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 Rebekah R Cohn
- 👤 Charles A Coolidge
- 👤 Seligman Eustace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3693; A61M1/3696; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0429; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
THE METHOD OF TREATING NON-CLOTTING BLOOD AS IT FLOWS CONTINUOUSLY FROM A SOURCE OF SUPPLY WHICH COMPRISES CENTRIFUGING THE NON-CLOTTING BLOOD AS IT CONTINUOUSLY FLOWS IN THE FORM OF A FILM ACROSS AND OFF A LAYER OF A SOLUTION HAVING A DENSITY LESS THAN THE DENSITY OF THE RED CELLS BUT GREATER THAN THE DENSITY OF THE PLASMA AND WHITE CELLS TO DIVERT RED CELLS FROM THE PATH OF FLOW OF THE PLASMA AND WHITE CELLS, CONTINUOUSLY COLLECTING THE DIVERTED RED CELLS SEPARATED FROM THE PLASMA FLOWING OFF SAID LAYER AND THEN CENTRIFUGING THE PLASMA AND WHITE CELLS AFTER THEY FLOW OF SAID LAYER TO SEPARATE THE WHITE CELLS FROM THE PLASMA.
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |