US2878715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of blood plasma prothrombin time determinations
Assignee: Individual
•
Filing: 1956-02-06
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Granted: 1959-03-24
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Mark C Rhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/4905; G01N21/00; G01N21/01; G01N21/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD OF BLOOD PLASMA PROTHROMBIN DETERMINATION COMPRISING BRINGING SEPARATELY A QUANTITY OF PLASMA AND A QUANTITY OF CLOTTING SOLUTION TO A TEMPERATURE OF SUBSTANTIALLY 37*C., POSITIONING ONE OF SAID QUANTITIES IN A PHOTOELECTRIC DEVICE RESPONSIVE TO A CHANGE IN TURBIDITY, ADDING THE OTHER QUANTITY, AND ABSERVING THE TIME
Claim 2
Independent Claim
49 words
A METHOD OF BLOOD PLASMA PROTHROMBIN DETERMINATION COMPRISING BRINGING SEPARATELY A QUANTITY OF PLASMA AND A QUANTITY OF CLOTTING SOLUTION TO A TEMPERATURE OF SUBSTANTIALLY 37*C., POSITIONING ONE OF SAID QUANTITIES IN A PHOTOELECTRIC DEVICE RESPONSIVE TO A CHANGE IN TURBIDITY, ADDING THE OTHER QUANTITY, AND ABSERVING THE TIME
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Cited
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Cited
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Cited
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |