US3011874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator strip and method of testing
Assignee: Individual
•
Filing: 1960-01-25
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Granted: 1961-12-05
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Expires: 1980-01-25
Abstract
No abstract record available.
Inventors
- 👤 Marshall E Deutsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:51
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/58; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A TEST INDICATOR FOR QUANTITATIVELY DETERMINING THE AMOUNT OF A BIOCHEMICAL SUBSTANCE IN A BODY FLUID WHICH COMPRISES A STRIP OF BIBULOUS MATERIAL IMPREGNATED WITH A PLURALITY OF REAGENT SYSTEMS IN BANDS EXTENDING THE WIDTH OF SAID STRIP, SAID BANDS COMPRISING A FIRST REACTION BAND AT ONE END OF SAID STRIP UNIFORMLY IMPREGNATED WITH A REAGENT SYSTEM ADAPTED TO UNDERGO A REACTION WITH SAID BIOCHEMICAL SUBSTANCE TO FORM A GAS, SECOND BAND ADJACENT TO SAID REACTION BAND UNIFORMLY IMPREGNATED WITH A MATERIAL ADAPTED TO RELEASE SAID GAS FROM SOLUTION, A THIRD BADN ADJACENT TO SAID SECOND BAND UNIFORMLY IMPREGNATED WITH AN INERT IMPREGNATED ADAPTED TO PREVENT CAPILLARY FLOW THROUGH SAID THIRD BAND AND A FOURTH BAND ADJACENT TO SAID THIRD BAND UNIFORMLY IMPREGNATED WITH AN INDICATOR ADAPTED TO CHANGE COLOR TO A DEGREE PROPORTIONAL TO THE AMOUNT OF SAID GAS FORMED BY SAID REACTION.
Claim 2
Dependent Claim
144 words
A TEST INDICATOR FOR QUANTITATIVELY DETERMINING THE AMOUNT OF A BIOCHEMICAL SUBSTANCE IN A BODY FLUID WHICH COMPRISES A STRIP OF BIBULOUS MATERIAL IMPREGNATED WITH A PLURALITY OF REAGENT SYSTEMS IN BANDS EXTENDING THE WIDTH OF SAID STRIP, SAID BANDS COMPRISING A FIRST REACTION BAND AT ONE END OF SAID STRIP UNIFORMLY IMPREGNATED WITH A REAGENT SYSTEM ADAPTED TO UNDERGO A REACTION WITH SAID BIOCHEMICAL SUBSTANCE TO FORM A GAS, SECOND BAND ADJACENT TO SAID REACTION BAND UNIFORMLY IMPREGNATED WITH A MATERIAL ADAPTED TO RELEASE SAID GAS FROM SOLUTION, A THIRD BADN ADJACENT TO SAID SECOND BAND UNIFORMLY IMPREGNATED WITH AN INERT IMPREGNATED ADAPTED TO PREVENT CAPILLARY FLOW THROUGH SAID THIRD BAND AND A FOURTH BAND ADJACENT TO SAID THIRD BAND UNIFORMLY IMPREGNATED WITH AN INDICATOR ADAPTED TO CHANGE COLOR TO A DEGREE PROPORTIONAL TO THE AMOUNT OF SAID GAS FORMED BY SAID REACTION.
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |