US2750671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microhematocrit and sedimentation reader
Assignee: Thermo IEC Inc
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Filing: 1955-05-04
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Granted: 1956-06-19
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Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Jones Alan Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:05
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0414; G; G01; G01N; G01N15/00; G01N15/04; G01N15/05; B04B7/00; B04B7/02; B04B2007/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A DEVICE FOR DETERMINING THE PACKED RED CELL PERCENTAGE VALUE OF CENTRIFUGED BLOOD IN A CAPILLARY TUBE, COMPRISING A BASE, A MEMBER MOUNTED FOR ROTATION ABOUT A FIXED AXIS ON THE BASE, MEANS PROVIDING A LOGARITHMIC SCALE GRADUATED FROM ONE TO 100 ASSOCIATED WITH THE ROTATABLE MEMBER TO MOVE SYNCHRONOUSLY THEREWITH PAST A FIXED INDEX, A DISK SUPERPOSED ON THE MEMBER FOR ROTATION THEREWITH ABOUT SAID AXIS, MEANS FRICTIONALLY CONNECTING THE DISK AND MEMBER, A LOGARITHMIC SPIRAL ON THE DISK EXTENDING ABOUT SAID AXIS, AND AN ARM FIXED TO THE BASE AND EXTENDING RADIALLY OUTWARD FROM SAID AXIS OVER THE DISK, THE ARM BEING ADAPTED TO SUPPORT A CAPILLARY TUBE RADIALLY THEREON AND HAVING AN INDEX ADJACENT TO SAID AXIS AND DISPOSED THEREFROM A RADIAL DISTANCE CORRESPONDING TO THAT OF THE INNER END OF SAID SPIRAL.
Claim 2
Independent Claim
136 words
A DEVICE FOR DETERMINING THE PACKED RED CELL PERCENTAGE VALUE OF CENTRIFUGED BLOOD IN A CAPILLARY TUBE, COMPRISING A BASE, A MEMBER MOUNTED FOR ROTATION ABOUT A FIXED AXIS ON THE BASE, MEANS PROVIDING A LOGARITHMIC SCALE GRADUATED FROM ONE TO 100 ASSOCIATED WITH THE ROTATABLE MEMBER TO MOVE SYNCHRONOUSLY THEREWITH PAST A FIXED INDEX, A DISK SUPERPOSED ON THE MEMBER FOR ROTATION THEREWITH ABOUT SAID AXIS, MEANS FRICTIONALLY CONNECTING THE DISK AND MEMBER, A LOGARITHMIC SPIRAL ON THE DISK EXTENDING ABOUT SAID AXIS, AND AN ARM FIXED TO THE BASE AND EXTENDING RADIALLY OUTWARD FROM SAID AXIS OVER THE DISK, THE ARM BEING ADAPTED TO SUPPORT A CAPILLARY TUBE RADIALLY THEREON AND HAVING AN INDEX ADJACENT TO SAID AXIS AND DISPOSED THEREFROM A RADIAL DISTANCE CORRESPONDING TO THAT OF THE INNER END OF SAID SPIRAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |