US2833691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood preservation by ion exchange resin decalcification
Assignee: Abbott Laboratories
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Filing: 1951-07-24
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Granted: 1958-05-06
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Expires: 1971-07-24
Abstract
No abstract record available.
Inventors
- 👤 Klaas Nicholas Paul
- 👤 Arnold E Osterberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:51
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/14; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE METHOD OF PRESERVING WHOLE BLOOD, THE STEP WHICH ESSENTIALLY COMPRISES, CONTACTING BLOOD, IMMEDIATELY ON WITHDRAWAL FROM A LIVING BODY, WITH A MIXTURE OF CATION EXCHANGE RESINS BUFFERED TO PH 7.2-7.4, SAID MIXTURE COMPRISING ABOUT 2%-10% ON A VOLUME/VOLUME BASIS OF THE POTASSIUM SALT FORM THEREOF, AND THE REMAINDER OF THE MIXTURE IN THE SODIUM SALT FORM THEREOF, WHEREBY THE CALCIUM ION OF THE BLOOD PLASMA IS SUBSTANTIALLY ABSORBED ON THE CATION EXCHANGE RESIN, AND THE BLOOD PLASMA AND BLOOD CELL POTASSIUM-SODIUM IONIC BALANCE IN SUBSTANTIALLY MAINTAINED.
Claim 2
Dependent Claim
88 words
IN THE METHOD OF PRESERVING WHOLE BLOOD, THE STEP WHICH ESSENTIALLY COMPRISES, CONTACTING BLOOD, IMMEDIATELY ON WITHDRAWAL FROM A LIVING BODY, WITH A MIXTURE OF CATION EXCHANGE RESINS BUFFERED TO PH 7.2-7.4, SAID MIXTURE COMPRISING ABOUT 2%-10% ON A VOLUME/VOLUME BASIS OF THE POTASSIUM SALT FORM THEREOF, AND THE REMAINDER OF THE MIXTURE IN THE SODIUM SALT FORM THEREOF, WHEREBY THE CALCIUM ION OF THE BLOOD PLASMA IS SUBSTANTIALLY ABSORBED ON THE CATION EXCHANGE RESIN, AND THE BLOOD PLASMA AND BLOOD CELL POTASSIUM-SODIUM IONIC BALANCE IN SUBSTANTIALLY MAINTAINED.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |