Patent US2514817A successfully refreshed from Google Patents.
US3296922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining oxygen saturation of blood
Assignee: American Optical Corp
•
Filing: 1963-04-22
•
Granted: 1967-01-10
•
Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/22; G01J1/24; G01N21/251
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
226 words
APPARATUS FOR DETERMINING THE PERCENTAGE OF OXYGEN SATURATION OF WHOLE BLOOD COMPRISING MEANS FOR SUPPORTING A SAMPLE OF BLOOD TO BE TESTED, MEANS FOR DIRECTING LIGHT ONTO SAID SAMPLE OF BLOOD TO BE AT LEAST PARTIALLY REFLECTED THEREBY, OPTICAL MEANS FOR RECEIVING AT LEAST A PORTION OF SAID LIGHT REFLECTED FROM SAID SAMPLE, SAID OPTICAL MEANS BEING ARRANGED TO DIVIDE SAID PORTION OF REFLECTED LIGHT AND DIRECT PORTIONS THEREOF ALONG SEPARATE PATHS, A LIGHT FILTER IN EACH OF SAID PATHS, EACH OF SAID FILTERS BEING ADAPTED TO TRANSMIT LIGHT OF A PRESELECTED BAND OF WAVELENGTHS DIFFERENT FROM THE OTHER, MEANS FOR COMPARING THE INTENSITY OF LIGHT PASSED THROUGH ONE OF SAID FILTERS WITH THAT PASSED THROUGH THE OTHER, OPTICAL ATTENUATOR MEANS IN ONE OF SAID PATHS FOR ADJUSTING THE LIGHT IN SAID ONE PATH TO EQUALITY WITH THE OTHER, SAID ATTENUATOR MEANS BEING CALIBRATED IN PERCENTAGE OF OXYGEN SATURATION IN SAID SAMPLE, A REFERENCE STANDARD OF REFLECTION POSITIONED ADJACENT SAID MEANS FOR SUPPORTING SAID SAMPLE, MEANS FOR SUBSTITUTING SAID STANDARD FOR SAID SAMPLE TO REFLECT LIGHT FROM SAID SOURCE INTO SAID OPTICAL MEANS, AND MEANS RESPONSIVE TO SAID MEANS FOR MOVING SAID STANDARD FOR POSITIONING SAID ATTENUATOR AT A PREDETERMINED CALIBRATION AND AN ADJUSTMENT IN SAID COMPARING MEANS TO CAUSE SAID COMPARING MEANS TO INDICATE EQUALITY IN THE QUANTITY OF LIGHT IN EACH OF SAID PATHS.
Claim 2
Dependent Claim
226 words
APPARATUS FOR DETERMINING THE PERCENTAGE OF OXYGEN SATURATION OF WHOLE BLOOD COMPRISING MEANS FOR SUPPORTING A SAMPLE OF BLOOD TO BE TESTED, MEANS FOR DIRECTING LIGHT ONTO SAID SAMPLE OF BLOOD TO BE AT LEAST PARTIALLY REFLECTED THEREBY, OPTICAL MEANS FOR RECEIVING AT LEAST A PORTION OF SAID LIGHT REFLECTED FROM SAID SAMPLE, SAID OPTICAL MEANS BEING ARRANGED TO DIVIDE SAID PORTION OF REFLECTED LIGHT AND DIRECT PORTIONS THEREOF ALONG SEPARATE PATHS, A LIGHT FILTER IN EACH OF SAID PATHS, EACH OF SAID FILTERS BEING ADAPTED TO TRANSMIT LIGHT OF A PRESELECTED BAND OF WAVELENGTHS DIFFERENT FROM THE OTHER, MEANS FOR COMPARING THE INTENSITY OF LIGHT PASSED THROUGH ONE OF SAID FILTERS WITH THAT PASSED THROUGH THE OTHER, OPTICAL ATTENUATOR MEANS IN ONE OF SAID PATHS FOR ADJUSTING THE LIGHT IN SAID ONE PATH TO EQUALITY WITH THE OTHER, SAID ATTENUATOR MEANS BEING CALIBRATED IN PERCENTAGE OF OXYGEN SATURATION IN SAID SAMPLE, A REFERENCE STANDARD OF REFLECTION POSITIONED ADJACENT SAID MEANS FOR SUPPORTING SAID SAMPLE, MEANS FOR SUBSTITUTING SAID STANDARD FOR SAID SAMPLE TO REFLECT LIGHT FROM SAID SOURCE INTO SAID OPTICAL MEANS, AND MEANS RESPONSIVE TO SAID MEANS FOR MOVING SAID STANDARD FOR POSITIONING SAID ATTENUATOR AT A PREDETERMINED CALIBRATION AND AN ADJUSTMENT IN SAID COMPARING MEANS TO CAUSE SAID COMPARING MEANS TO INDICATE EQUALITY IN THE QUANTITY OF LIGHT IN EACH OF SAID PATHS.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |