Patent US2738060A successfully refreshed from Google Patents.
US2862796A
Expired / Lapsed
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Method and means for testing aqueous solutions for presence of protein
Assignee: Individual
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Filing: 1953-07-20
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Granted: 1958-12-02
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Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Edward N Gomberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/68; G01N33/6803; G01N33/6827; G01N33/6839
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A METHOD OF SPOT TESTING A LIQUID FOR PROTEIN CONTENT ON A POROUS PAPER WHICH IS INERT TO SAID LIQUID, WHICH INCLUDES THE STEPS OF: PLACING A DROP OF SAID LIQUID AT A POINT ON SAID POROUS PAPER, SAID POROUS PAPER BEING IMPREGNATED WITH AN ALKALOID REAGENT WHEREBY TO COAGULATE SUBSTANTIALLY ALL THE PROTEIN IN SAID LIQUID IN A RESTRICTED AREA WITHIN THE PORES OF SAID PAPER, AND CONTACTING SAID COAGULATED PROTEIN WITH A MEASURED AMOUNT OF WATERSOLUBLE ACIDIC PROTEIN-REACTIVE COAL-TAR DYE SOLUTION WHEREBY TO COLOR-DELINEATE SAID RESTRICTED AREA OF PROTEIN, THE COLOR-DELINEATION OF SAID RESTRICTED AREA HAVING AN INTENSITY AND SIZE APPROXIMATELY PROPORTIONAL TO THE AMOUNT OF PROTEIN IN SAID RESTRICTED AREA THEREBY FURNISHING A SEMIQUANTITATIVE DETERMINATION OF THE AMOUNT OF SAID PROTEIN IN SAID LIQUID.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |