Patent US3226196A successfully refreshed from Google Patents.
US3226196A
Expired / Lapsed
US
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Method of testing urine for pregnancy
Assignee: Individual
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Filing: 1961-11-22
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Granted: 1965-12-28
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Vietes Joseph R La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF TESTING FEMALE URINE TO DETERMINE PREGNANCY WHICH CONSISTS ESSENTIALLY OF PLACING SAID URINE IN A TEST CONTAINER, ADDING THERTO A SMALL AMOUNT OF DINITROPHENYLHYDRAZINE, THE MIXTUE SO FORMED BEING ACID INTRODUCING AN INDICATOR IN THE CONTAINER ADAPTED TO RESPOND BY CHANGE OF COLOR TO ACIDITY OF URINE, ALLOWING THE URINE TO STAND FOR AT LEST ABOUT TWO MINUTES, THEN RENDERING THE MIXTURE ALKALINE BY INTRODUCING AQUEOUS ALKALI, AND NOTING THE COLOR IN THE MIXTURE.
Claim 2
Independent Claim
77 words
A METHOD OF TESTING FEMALE URINE TO DETERMINE PREGNANCY WHICH CONSISTS ESSENTIALLY OF PLACING SAID URINE IN A TEST CONTAINER, ADDING THERTO A SMALL AMOUNT OF DINITROPHENYLHYDRAZINE, THE MIXTUE SO FORMED BEING ACID INTRODUCING AN INDICATOR IN THE CONTAINER ADAPTED TO RESPOND BY CHANGE OF COLOR TO ACIDITY OF URINE, ALLOWING THE URINE TO STAND FOR AT LEST ABOUT TWO MINUTES, THEN RENDERING THE MIXTURE ALKALINE BY INTRODUCING AQUEOUS ALKALI, AND NOTING THE COLOR IN THE MIXTURE.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |