US2608533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for testing biological fluids
Assignee: Individual
•
Filing: 1951-01-30
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Granted: 1952-08-26
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Expires: 1971-01-30
Abstract
No abstract record available.
Inventors
- 👤 Richard M Carson
- 👤 Reuben R Saeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:02
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/66; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD OF TESTING A BIOLOGICAL FLUID WHICH COMPRISES ADDING A SAMPLE OF THE FLUID TO A REAGENT CONTAINING SODIUM MANGANATE, POTASSIUM MANGANATE AND SODIUM HYDROXIDE TO EFFECT OXIDIZATION OF THE REDUCING SUBSTANCES IN SAID FLUID AT A RATE WHICH WILL PERMIT THE TIME REQUIRED FOR OXIDIZATION TO BE MEASURED.
Claim 2
Dependent Claim
72 words
A REAGENT FOR DETERMINING THE PRESENCE AND PROPORTIONS OF REDUCING AGENTS SUCH AS GLUCOSE IN BIOLOGICAL FLUIDS BY A MARKED CHANGE OF COLOR OF THE REAGENT WITHIN PREDETERMINED PERIODS OF TIME AND WITHOUT THE APPLICATION OF EXTERNAL HEAT COMPRISING AN AQUEOUS SOLUTION OF AN ALKALI METAL MANGANATE AND OF AN ALKALI METAL HYDROXIDE IN WHICH THE ALKALI METAL MANGANATE COMPRISES APPROXIMATELY BETWEEN 0.1% AND 2.6% BY WEIGHT OF THE ALKALI METAL HYDROXIDE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |