Hematocrit reader
Abstract
Abstract THIS INVENTION RELATES TO A HEMATOCRIT TUBE READER IN WHICH THE HEMATOCRIT TUBE IS SCANNED BY MEANS OF A LIGHT SOURCE OF PHOTOCELL TO DETECT THE VOLUMES OF THE PLASMA AND OF THE BLOOD CELLS AND TO PRODUCE FROM THAT INFORMATION A VOLTAGE OUTPUT THAT IS CALIBRATED DIRECTLY IN PERCENTAGE OF BLOOD CELL VOLUME IN RELATION TO THE TOTAL SAMPLE VOLUME. A LIGHT SOURCE DIRECTS LIGHT AT A PHOTOCELL THROUGH THE TUBE TO BE READ AS THE TUBE IS MOVED LENGTHWISE PAST THE CELL. THE PHOTOCELL IN RESPONSE TO THE DIFFERENCES IN THE LIGHT TRANSMISSION CHARACTERISTICS OF THE TUBE ACTUATES ELECTRO-MECHANICALLY AN INDICATOR WHICH SHOW THE RATION OF THE VOLUME OF BLOOD CELLS TO THE TOTAL SAMPLE VOLUME.
Inventors
- 👤 Pershing Nakada
- 👤 Clarence H Hambel
- 👤 Fred K Suzuki
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |