Patent US3785772A successfully refreshed from Google Patents.
US3785772A
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US
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Blood analyzer
Assignee: BLOWITZ M
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Filing: 1971-12-08
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Granted: 1974-01-15
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Expires: 1991-12-08
Abstract
Abstract A pair of syringes respectively coupled by way of a pair of three-way valves to a source of blood and a source of reagent, so that withdrawing the plungers fills the syringes respectively with blood and reagent. The three-way valves are switched and a motor mechanism is activated simultaneously to move the plungers into the syringes to move the blood and the reagent through a pair of chambers separated by a semipermeable membrane. A selected substance in the blood is dialyzed through the membrane and reacts with the reagent to furnish a product, the concentration of which is measured to determine the concentration of the selected substance in the blood.
Inventors
- 👤 J Coggeshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A device as in claim 1 wherein the axes of the inlet and the outlet of one of said chambers are colinear and the axes of the inlet and the outlet of the other of said chambers are colinear.
Claim 2
Dependent Claim
16 words
A device as in claim 1 wherein the volumes of said chambers are substantially the same.
Claim 3
Dependent Claim
21 words
A device as in claim 1 wherein the flow rates are about 0.17 of the volume of the chamber per second.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |