Patent US3282149A successfully refreshed from Google Patents.
US3282149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear photoelectric refractometer
Assignee: Wyeth Holdings LLC
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Filing: 1963-04-10
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Granted: 1966-11-01
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Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Shaw Robert Frank
- 👤 Johnson Gerald Alvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:47
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/43; G01N21/431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A REFRACTOMETER FOR MEASURING THE INDEX OF REFRACTION OF A FLUID COMPRISING A COILED BAR HAVING AT LEAST 360* OF CURVATURE, A SOURCE OF LIGHT OF CONSTANT INTENSITY SO POSITIONED THAT AT LEAST PART OF THE LIGHT FROM SAID SOURCE IS INCIDENT ON ONE END OF SAID BAR, AND DIRECTED ALONG THE LENGTH OF THE BAR, AND INCLUDES AT LEAST ONE WAVE LENGTH TO WHICH THE BAR IS TRANSPARENT, AND A PHOTODETECTION MEANS AT THE OTHER END OF SAID BAR TO MEASURE THE TRANSMITTED RADIASNT ENERGY PASSED LONGITUDINALLY THROUGH SAID BAR, MEANS TO MAINTAIN THE ENTIRE COILED PORTION OF SAID COILED BAR IMMERSED IN SAID FLUID, AND PROTECT THE BAR AND DETECTION MEANS FROM VARIABLE INTENSITY STRAY LIGHT, WHEREBY THE TRANSMITTED LIGHT IS SUBJECT TO MULTIPLE INTERNAL REFLECTIONS AT THE BAR-LIQUID INTERFACE ALONG SAID COILED PORTION OF SAID BAR SO THAT THE VALUE OF THE TRANSMITTED LIGHT IS A SUBSTANITALLY LINEAR FUNCTION OF THE REFRACTIVE INDEX OF SAID FLUID.
Claim 2
Dependent Claim
159 words
A REFRACTOMETER FOR MEASURING THE INDEX OF REFRACTION OF A FLUID COMPRISING A COILED BAR HAVING AT LEAST 360* OF CURVATURE, A SOURCE OF LIGHT OF CONSTANT INTENSITY SO POSITIONED THAT AT LEAST PART OF THE LIGHT FROM SAID SOURCE IS INCIDENT ON ONE END OF SAID BAR, AND DIRECTED ALONG THE LENGTH OF THE BAR, AND INCLUDES AT LEAST ONE WAVE LENGTH TO WHICH THE BAR IS TRANSPARENT, AND A PHOTODETECTION MEANS AT THE OTHER END OF SAID BAR TO MEASURE THE TRANSMITTED RADIASNT ENERGY PASSED LONGITUDINALLY THROUGH SAID BAR, MEANS TO MAINTAIN THE ENTIRE COILED PORTION OF SAID COILED BAR IMMERSED IN SAID FLUID, AND PROTECT THE BAR AND DETECTION MEANS FROM VARIABLE INTENSITY STRAY LIGHT, WHEREBY THE TRANSMITTED LIGHT IS SUBJECT TO MULTIPLE INTERNAL REFLECTIONS AT THE BAR-LIQUID INTERFACE ALONG SAID COILED PORTION OF SAID BAR SO THAT THE VALUE OF THE TRANSMITTED LIGHT IS A SUBSTANITALLY LINEAR FUNCTION OF THE REFRACTIVE INDEX OF SAID FLUID.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |