US3158445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining prothrombin time
Assignee: Oxford Laboratories Inc
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Filing: 1960-07-06
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Granted: 1964-11-24
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Expires: 1980-07-06
Abstract
No abstract record available.
Inventors
- 👤 Huff Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/4905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROTHROMBIN TIME DETERMINING APPARATUS COMPRISING A BLOCK OF METAL HAVING UPPER AND LOWER SURFACES, MEANS FOR TRANSMITTING LIGHT BETWEEN SAID UPPER AND LOWER SURFACES, SAID MEANS FOR TRANSMITTING LIGHT INCLUDING A TRANSLUCENT ROD, A TRANSPARENT SLIDE DISPOSED ON THE UPPER SURFACE OF SAID BLOCK OF METAL, THE TRANSPARENT SLIDE INCLUDING AT LEAST ONE CONCAVE DIMPLE ON THE UPPER SURFACE THEREOF FOR RECEIVING BLOOD AND REAGENT, SAID DIMPLE BEING DISPOSED ABOVE SAID MEANS FOR TRANSMITTING LIGHT, AND A SOURCE OF LIGHT DISPOSED ADJACENT SAID MEANS AT THE LOWER SURFACE OF SAID BLOCK OF METAL WHEREBY A CHANGE OF LIGHT TRANSMISSIVITY MAY BE DETECTED WHEN SAID BLOOD AND REAGENT COAGULATE.
Claim 2
Dependent Claim
109 words
A PROTHROMBIN TIME DETERMINING APPARATUS COMPRISING A BLOCK OF METAL HAVING UPPER AND LOWER SURFACES, MEANS FOR TRANSMITTING LIGHT BETWEEN SAID UPPER AND LOWER SURFACES, SAID MEANS FOR TRANSMITTING LIGHT INCLUDING A TRANSLUCENT ROD, A TRANSPARENT SLIDE DISPOSED ON THE UPPER SURFACE OF SAID BLOCK OF METAL, THE TRANSPARENT SLIDE INCLUDING AT LEAST ONE CONCAVE DIMPLE ON THE UPPER SURFACE THEREOF FOR RECEIVING BLOOD AND REAGENT, SAID DIMPLE BEING DISPOSED ABOVE SAID MEANS FOR TRANSMITTING LIGHT, AND A SOURCE OF LIGHT DISPOSED ADJACENT SAID MEANS AT THE LOWER SURFACE OF SAID BLOCK OF METAL WHEREBY A CHANGE OF LIGHT TRANSMISSIVITY MAY BE DETECTED WHEN SAID BLOOD AND REAGENT COAGULATE.
References Cited (Backward Citations)
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Cited
US2276021A
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US2333791A
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US2417802A
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US2878715A
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US3041146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |