Patent US3733179A successfully refreshed from Google Patents.
US3733179A
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US
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Method and apparatus for the quantitative determination of blood chemicals in blood derivatives
Assignee: 3M Co
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Filing: 1968-08-29
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Granted: 1973-05-15
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Expires: 1988-08-29
Abstract
Abstract A METHOD FOR THE QUANTITATIVE DETERMINATION OF A BLOOD CHAMICAL IN A BLOOD DERIVATIVE WHEREIN A FIRST CONTAINER CONTAINING A BLOOD DERIVATIVE SAMPLE AND A SOLUTION CAPABLE OF FORMING THEREWITH A REACTIVE COMPONENT IS JOINED BY FILTER MEANS TO A SECOND CONTAINER OF TEST MATERIAL CAPABLE OF REACTING WITH THE REACTIVE COMPONENT TO FORM A COLORED SOLUTION HAVING AN OPTICAL DENSITY DEPENDENT UPON THE CONCENTRATION OF THE BLOOD CHEMICAL. THE CONTENTS OF THE COMPARTMENTS ARE COMBINED BY CENTRIFUGING THE ASSEMBLY. THE OPTICAL DENSITY OF THE COLORED FLUID IS MEASURED AND IS CORRELATED WITH THE CONCENTRATION OF THE BLOOD CHEMICAL. APPARATUS FOR PRACTICING THIS METHOD.
Inventors
- 👤 P Guehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:49
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/528; G01N33/92
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |