US3103546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photorefractometer
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
•
Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:14
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/43; G01N21/431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PHOTOREFRACTOMETER COMPRISING IN COMBINATION: A LIGHT SOURCE, WAVE LENGTH SELECTOR MEANS THROUGH WHICH LIGHT EMITTED FROM SAID LIGHT SOURCE IS DIRECTED, A PHOTORECEPTOR MEMBER, AND A PLURALITY OF LIGHT-TRANSPARENT DIELECTRIC MEMBERS WHICH CONVEY LIGHT BY INTERNAL REFLECTION INTERPOSITIONED BETWEEN SAID WAVE LENGTH SELECTOR AND SAID PHOTORECEPTOR MEMBER, EACH OF SAID LIGHT-TRANSPARENT MEMBERS BEING ADJUSTABLE BETWEEN SAID WAVE LENGTH SELECTOR AND SAID PHOTORECEPTOR MEMBER, EACH OF SAID LIGHTTRANSPARENT MEMBERS VARYING ONE FROM THE OTHER BY AN INCREMENT OF REFRACTIVE INDEX AND BEING FURTHER CHARACTERIZED BY BEING IN CONICAL SHAPE, THE LARGER END OF SAID LIGHTTRANSPARENT MEANS FACING SAID WAVE LENGTH SELECTOR MEANS, SAID DIELECTRIC MEMBERS TRANSMITTING LIGHT AS A FUNCTION OF THE REFRACTIVE INDEX OF ITS SURROUNDING MEDIUM WHEREBY THE REFRACTIVE INDEX OF SUCH MEDIUM IS DETERMINED.
Claim 2
Dependent Claim
127 words
A PHOTOREFRACTOMETER COMPRISING IN COMBINATION: A LIGHT SOURCE, WAVE LENGTH SELECTOR MEANS THROUGH WHICH LIGHT EMITTED FROM SAID LIGHT SOURCE IS DIRECTED, A PHOTORECEPTOR MEMBER, AND A PLURALITY OF LIGHT-TRANSPARENT DIELECTRIC MEMBERS WHICH CONVEY LIGHT BY INTERNAL REFLECTION INTERPOSITIONED BETWEEN SAID WAVE LENGTH SELECTOR AND SAID PHOTORECEPTOR MEMBER, EACH OF SAID LIGHT-TRANSPARENT MEMBERS BEING ADJUSTABLE BETWEEN SAID WAVE LENGTH SELECTOR AND SAID PHOTORECEPTOR MEMBER, EACH OF SAID LIGHTTRANSPARENT MEMBERS VARYING ONE FROM THE OTHER BY AN INCREMENT OF REFRACTIVE INDEX AND BEING FURTHER CHARACTERIZED BY BEING IN CONICAL SHAPE, THE LARGER END OF SAID LIGHTTRANSPARENT MEANS FACING SAID WAVE LENGTH SELECTOR MEANS, SAID DIELECTRIC MEMBERS TRANSMITTING LIGHT AS A FUNCTION OF THE REFRACTIVE INDEX OF ITS SURROUNDING MEDIUM WHEREBY THE REFRACTIVE INDEX OF SUCH MEDIUM IS DETERMINED.
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |