Patent US3520659A successfully refreshed from Google Patents.
US3520659A
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US
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Method and apparatus for use in determining prothrombin time of a blood sample
Assignee: Xerox Corp
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Filing: 1967-10-20
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Granted: 1970-07-14
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Expires: 1987-10-20
Abstract
No abstract record available.
Inventors
- 👤 Sheldon Steinberg
- 👤 Serge Dewitte
- 👤 Josephus Van Balgooy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/4905; G01N35/00; G01N35/02
Claims Analysis
Total Claims: 0
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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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |