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US3127281A Expired / Lapsed US ⏱️ 0.0 years remaining

Means and method of making multi-test indicator

Assignee: —
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Filing: —
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Granted: 1964-03-31
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Expires: 1981-03-31
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Abstract

No abstract record available.

Inventors

No inventors recorded.

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:16
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N21/00; G01N21/75; G01N21/77; G01N21/78

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 198 words
A METHOD OF MAKING MULT-TEST INDICATORS COMPRISING THE STEPS OF APPLYING RESIN DISSOLVED IN A READILY EVAPORABLE SOLVENT TO ONE SURFACE OF A STRIP OF ABSORBENT MATERIAL IN SPACED PARALLEL LINES EXTENDING LENGTHWISE OF THE STRIP AND INWARDLY OF ITS LONGITUDINAL EDGES, CAUSING THE RESIN SOLUTION TO PENETRATE THE STRIP WHILE CONFINED AGAINST SIDE FLOW, THEN APPLYING FURTHER OF SAID RESIN SOLUTION IN SPACED PARALLEL LINES ON THE OPPOSED SIDE OF SAID STRIP IN COINCIDENCE WITH THE LINES APPLIED TO THE FIRST SURFACE, CAUSING SAID FURTHER RESIN SOLUTION TO PENETRATE THE STRIP TO THE FIRST APPLIED RESIN SOLUTION WHILE CONFINED AGAINST SIDE FLOW TO PRODUCE AT LEAST TWO CONFINED AREAS EXTENDING LENGTHWISE OF THE STRIP AND WHICH ARE ISOLATED FROM EACH OTHER BY THE LINES OF RESIN LEFT IN ABSORBENT MATERIAL ON EVAPORATION OF THE SOLVENT WHICH EXTEND THROUGH THE THICKNESS OF THE STRIP, EVAPORATING THE SOLVENT TO FORM SAID RESIN LINES AND THEREAFTER APPLYING ONE SOLUTION OF TEST REAGENT TO ONE OF SAID CONFINED AREAS, APPLYING A SECOND SOLUTION TEST REAGENT TO ANOTHER CONFINED AREA, AND AFTER DRYING CUTTING SAID STRIP TRANSVERSELY OF SAID RESIN LINES TO DIVIDE IT INTO A PLURALITY OF STICK-LIKE MULTI-TEST INDICATOR MEMBERS.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1967-03-31 1967-09-30 1968-03-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-03-31 1971-09-30 1972-03-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-03-31 1975-09-30 1976-03-31 $7700.00 Window Closed / Lapsed

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