US2747455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential refractometer
Assignee: Union Carbide Corp
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Filing: 1954-08-20
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Granted: 1956-05-29
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Stanford B Spracklen
- 👤 Donald N Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:14
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
231 words
DIFFERENTIAL REFACTOMETER FOR MEASURING THE DIFFERENCE BETWEEN THE REFRACTIVE INDICES OF TWO LIQUIDS COMPRISING, MEANS FOR FORMING A WEDGE OF LIGHT OF CONTROLLED DIRECTION AND DIMENSION; A FIRST CELL, POSITIONED IN SAID WEDGE OF LIGHT, HAVING OPTICALLY OPPOSED LIGHT INLET AND LIGHT EXIT WALL PORTION PERVIOUS TO THE TRANSMISSION OF SAID WEDGE OF LIGHT THERETHROUGH, THE SURFACE OF SAID LIGHT INLET PORTION BEING POSITIONED NORMAL TO SAID WEDGE OF LIGHT IN THE REGION OF LIGHT INLET AND SAID LIGHT EXIT WALL PORTION BEING SHAPED TO FORM A SURFACE HAVING EQUAL CIRCULAR CROSS-SECTIONS IN THE PLANES IN WHICH REFRACTION OF SAID WEDGE OF LIGHT OCCURS; A SECOND CELL POSITIONED IN THE PATH OF SAID WEDGE OF LIGHT, SAID SECOND CELL HAVING OPTICALLY-OPPOSED LIGHT INLET AND LIGHT EXIT WALL PORTIONS PREVIOUS TO TRANSMISSION OF LIGHT THERETHROUGH, SAID INLET PORTION BEING POSITIONED NORMAL TO THE PATH OF SAID WEDGE OF LIGHT IN THE REGION OF LIGHT INLET, SAID EXIT PORTION BEING POSITIONED AT THE GEOMETRIC CENTER OF SAID CROSS-SECTION CIRCLES OF SAID LIGHT EXIT PORTION OF SAID FIRST CELL; MEANS ASSOCIATED WITH SAID CELL FOR PASSING SAID LIQUIDS THERETO; AND MEANS RESPONSIVE TO THE CHANGE IN DIRECTION OF SAID WEDGE OF LIGHT EMERGING SAID CHANGE IN DIRECTION OF SAID EMERGENT WEDGE OF LIGHT WITH THE CHANGE IN THE DIFFERENTIAL REFRACTIVE INDEX CAUSED BY A CHANGE IN THE REFRACTIVE INDEX OF ONE OF SAID LIQUIDS.
Claim 2
Dependent Claim
231 words
DIFFERENTIAL REFACTOMETER FOR MEASURING THE DIFFERENCE BETWEEN THE REFRACTIVE INDICES OF TWO LIQUIDS COMPRISING, MEANS FOR FORMING A WEDGE OF LIGHT OF CONTROLLED DIRECTION AND DIMENSION; A FIRST CELL, POSITIONED IN SAID WEDGE OF LIGHT, HAVING OPTICALLY OPPOSED LIGHT INLET AND LIGHT EXIT WALL PORTION PERVIOUS TO THE TRANSMISSION OF SAID WEDGE OF LIGHT THERETHROUGH, THE SURFACE OF SAID LIGHT INLET PORTION BEING POSITIONED NORMAL TO SAID WEDGE OF LIGHT IN THE REGION OF LIGHT INLET AND SAID LIGHT EXIT WALL PORTION BEING SHAPED TO FORM A SURFACE HAVING EQUAL CIRCULAR CROSS-SECTIONS IN THE PLANES IN WHICH REFRACTION OF SAID WEDGE OF LIGHT OCCURS; A SECOND CELL POSITIONED IN THE PATH OF SAID WEDGE OF LIGHT, SAID SECOND CELL HAVING OPTICALLY-OPPOSED LIGHT INLET AND LIGHT EXIT WALL PORTIONS PREVIOUS TO TRANSMISSION OF LIGHT THERETHROUGH, SAID INLET PORTION BEING POSITIONED NORMAL TO THE PATH OF SAID WEDGE OF LIGHT IN THE REGION OF LIGHT INLET, SAID EXIT PORTION BEING POSITIONED AT THE GEOMETRIC CENTER OF SAID CROSS-SECTION CIRCLES OF SAID LIGHT EXIT PORTION OF SAID FIRST CELL; MEANS ASSOCIATED WITH SAID CELL FOR PASSING SAID LIQUIDS THERETO; AND MEANS RESPONSIVE TO THE CHANGE IN DIRECTION OF SAID WEDGE OF LIGHT EMERGING SAID CHANGE IN DIRECTION OF SAID EMERGENT WEDGE OF LIGHT WITH THE CHANGE IN THE DIFFERENTIAL REFRACTIVE INDEX CAUSED BY A CHANGE IN THE REFRACTIVE INDEX OF ONE OF SAID LIQUIDS.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |