Patent US3443903A successfully refreshed from Google Patents.
US3443903A
Expired / Lapsed
US
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Chemical analysis test strips
Assignee: Roche Diagnostics GmbH
•
Filing: 1965-10-07
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Granted: 1969-05-13
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Expires: 1985-10-07
Abstract
No abstract record available.
Inventors
- 👤 Erich Haack
- 👤 Hans-Georg Rey
- 👤 Peter Rieckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; G01N33/523; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444; Y10T436/17; Y10T436/171538; Y10T436/173076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3127281A
Cited
US691249A
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US2229155A
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US2785057A
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US2889799A
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US3011874A
Cited
US3006735A
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US3311084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |