Patent US3232710A successfully refreshed from Google Patents.
US3232710A
Expired / Lapsed
US
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Indicator and method for manufacturing the same
Assignee: Roche Diagnostics GmbH
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Filing: 1963-03-05
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Granted: 1966-02-01
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Expires: 1983-03-05
Abstract
No abstract record available.
Inventors
- 👤 Rieckmann Peter
- 👤 Rey Hans-Georg
- 👤 Haack Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; C12Q1/54; G; G01; G01N; G01N31/00; G01N31/22; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; G01N33/523; C12Q2326/00; C12Q2326/10; C12Q2326/14; C12Q2326/40; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444; Y10T436/17; Y10T436/173076; Y10T436/177692; Y10T436/178459
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
ANALYTICAL INDICATOR CHARACTERIZED BY PROLONGED SHELF LIFE COMPRISING A SUBSTANTIALLY PLANE PAPER SHEET HAVING A WETTABLE SURFACE IMPREGNATED WITH A REAGENT FOR PRODUCING A CONTRASTING COLOR WITH RESPECT TO SAID PAPER SHEET ON SPREADING OF A LIQUID CONTAINING THE SUBSTANCE OF INTEREST THEREOVER AS VISUAL EVIDENCE OF THE PRESENCE OF SAID SUBSTANCE OF INTEREST IN SAID LIQUID, SAID INDICATOR INCLUDING SUPER-POSED UPPER AND LOWER LAYERS OF A WATER-INSOLUBLE PLASTIC MATERIAL, WITH THE PAPER SHEET THEREBETWEEN, SAID UPPER AND LOWER PLASTIC LAYERS OVERLYING, RESPECTIVELY, SUBSTANTIALLY THE ENTIRE UPPER AND LOWER SURFACES OF THE PAPER, SAID PLASTIC LAYERS EXTENDING BEYOND TWO OPPOSITE EDGE PORTIONS OF THE TEST PAPER AND BEING JOINED ALONG THE EDGES THEREOF DISPOSED OUTWARDLY OF THE STRIP FORMING A CLOSE-FITTING CLOSURE ABOUT THE TEST PAPER, AT LEAST ONE END OF THE CLOSURE BEING OPEN,
Claim 2
Dependent Claim
135 words
ANALYTICAL INDICATOR CHARACTERIZED BY PROLONGED SHELF LIFE COMPRISING A SUBSTANTIALLY PLANE PAPER SHEET HAVING A WETTABLE SURFACE IMPREGNATED WITH A REAGENT FOR PRODUCING A CONTRASTING COLOR WITH RESPECT TO SAID PAPER SHEET ON SPREADING OF A LIQUID CONTAINING THE SUBSTANCE OF INTEREST THEREOVER AS VISUAL EVIDENCE OF THE PRESENCE OF SAID SUBSTANCE OF INTEREST IN SAID LIQUID, SAID INDICATOR INCLUDING SUPER-POSED UPPER AND LOWER LAYERS OF A WATER-INSOLUBLE PLASTIC MATERIAL, WITH THE PAPER SHEET THEREBETWEEN, SAID UPPER AND LOWER PLASTIC LAYERS OVERLYING, RESPECTIVELY, SUBSTANTIALLY THE ENTIRE UPPER AND LOWER SURFACES OF THE PAPER, SAID PLASTIC LAYERS EXTENDING BEYOND TWO OPPOSITE EDGE PORTIONS OF THE TEST PAPER AND BEING JOINED ALONG THE EDGES THEREOF DISPOSED OUTWARDLY OF THE STRIP FORMING A CLOSE-FITTING CLOSURE ABOUT THE TEST PAPER, AT LEAST ONE END OF THE CLOSURE BEING OPEN,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |