US3347745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for freezing erythrocytes
Assignee: Union Carbide Corp
•
Filing: 1963-12-06
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Granted: 1967-10-17
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Expires: 1983-12-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Rinfret
- 👤 Clement W Cowley
- 👤 Gerald F Doebbler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:46
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/14; A61K35/18; A01; A01N; A01N1/00; A01N1/10; A01N1/12; A01N1/122; A01N1/125; A01N1/16; A01N1/162; A61M; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0429; A61M2205/00; A61M2205/36; A61M2205/3606; A61M2205/366
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR FREEZING ERYTHROCYTES IN BULK QUANTITIES WHICH COMPRISES PROVIDING IN A CONTAINER A MIXTURE OF ERYTHROCYTES AND AN AQUEOUS MEDIUM CONTAINING AT LEAST ABOUT 10 WEIGHT PERCENT BASED ON THE WEIGHT OF THE MEDIUM OF A HIGH MOLECULAR WEIGHT, WATER SOLUBLE POLYMER EXTRACELLULAR PROTECTIVE ADDITIVE, IMMERSING SAID CONTAINER IN A REFRIGERANT BATH AT A TEMPERATURE NOT WARMER THAN ABOUT - 100*C. AND TUBULENTLY AGITATING SAID MIXTURE SUCH THAT THE RATE OF HEAT TRANSFER IS AT LEAST 14,000 B.T.U./(HR.) (SQ. FT. OF CONTAINER SURFACE) AND CONTINUING SUCH REFRIGERATIVE CONTACT FOR A SUFFICIENT DURATION TO FORM A FROZEN SHELL OF SAID MIXTURE ON THE INNER SURFACE OF SAID CONTAINER.
Claim 2
Dependent Claim
109 words
A PROCESS FOR FREEZING ERYTHROCYTES IN BULK QUANTITIES WHICH COMPRISES PROVIDING IN A CONTAINER A MIXTURE OF ERYTHROCYTES AND AN AQUEOUS MEDIUM CONTAINING AT LEAST ABOUT 10 WEIGHT PERCENT BASED ON THE WEIGHT OF THE MEDIUM OF A HIGH MOLECULAR WEIGHT, WATER SOLUBLE POLYMER EXTRACELLULAR PROTECTIVE ADDITIVE, IMMERSING SAID CONTAINER IN A REFRIGERANT BATH AT A TEMPERATURE NOT WARMER THAN ABOUT - 100*C. AND TUBULENTLY AGITATING SAID MIXTURE SUCH THAT THE RATE OF HEAT TRANSFER IS AT LEAST 14,000 B.T.U./(HR.) (SQ. FT. OF CONTAINER SURFACE) AND CONTINUING SUCH REFRIGERATIVE CONTACT FOR A SUFFICIENT DURATION TO FORM A FROZEN SHELL OF SAID MIXTURE ON THE INNER SURFACE OF SAID CONTAINER.
References Cited (Backward Citations)
US2225774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |