Patent US3612696A successfully refreshed from Google Patents.
US3612696A
Expired / Lapsed
US
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Refractometer
Assignee: Applied Automation Inc
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Filing: 1969-01-21
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Granted: 1971-10-12
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Expires: 1989-01-21
Abstract
Abstract A refractometer cell comprises a housing forming a chamber through which radiation can be transmitted, said chamber being adapted to receive a test fluid. A radiation-transparent refracting means is positioned within the chamber. In one embodiment, this refractive means is a spherically shaped element. In another embodiment, the refractive means comprises two spaced elements having concave spherically shaped surfaces facing one another.
Inventors
- 👤 Arthur B Broerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:04
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A refractometer comprising: a radiation source; a radiation detector spaced from said source; and a refractometer cell comprising a housing forming a cylindrical chamber having a radiation transparent opening at each end, and a generally spherically shaped solid element of radiation transparent material positioned within said chamber and spaced form said openings so as to divide said chamber into first and second compartments, each of which is adapted to contain a fluid, the refractometer indices of which are to be compared, said cell being positioned with respect to said source and said detector so that radiation from said source passes through said first compartment, said element and second compartment to said detector.
Claim 2
Dependent Claim
112 words
A refractometer comprising: a radiation source; a radiation detector spaced from said source; and a refractometer cell comprising a housing forming a cylindrical chamber having a radiation transparent opening at each end, and a generally spherically shaped solid element of radiation transparent material positioned within said chamber and spaced form said openings so as to divide said chamber into first and second compartments, each of which is adapted to contain a fluid, the refractometer indices of which are to be compared, said cell being positioned with respect to said source and said detector so that radiation from said source passes through said first compartment, said element and second compartment to said detector.
Claim 3
Dependent Claim
56 words
The refractometer of claim 1, further comprising a first radiation-opaque member positioned centrally in the opening of said cell adjacent said source to reduce the amount of radiation entering said cell, and an annular radiation-opaque member positioned in the opening of said cell adjacent said detector to reduce the amount of radiation which reaches said detector.
Claim 4
Dependent Claim
47 words
The refractor of claim 1, wherein the radiation-transparent openings of said housing comprise flat plates of radiation transparent material and wherein opposite edges of said spherically shaped element are in engagement with respective ones of said plates and are flattened to reduce the volumes of said compartments.
Claim 5
Dependent Claim
112 words
A refractometer comprising: a radiation source; a radiation detector spaced from said source; and a refractometer cell comprising a housing forming a cylindrical chamber having a radiation-transparent opening at each end, and first and second solid members of radiation-transparent material positioned in said chamber between said openings and in spaced relationship with one another to form a compartment therebetween which is adapted to contain a fluid, the surfaces of said elements adjacent one another being concave and generally spherically shaped, said cell being positioned with respect to said source and said detector so that radiation from said source passes through said first member, said compartment and said second member to said detector.
Claim 6
Dependent Claim
112 words
A refractometer comprising: a radiation source; a radiation detector spaced from said source; and a refractometer cell comprising a housing forming a cylindrical chamber having a radiation-transparent opening at each end, and first and second solid members of radiation-transparent material positioned in said chamber between said openings and in spaced relationship with one another to form a compartment therebetween which is adapted to contain a fluid, the surfaces of said elements adjacent one another being concave and generally spherically shaped, said cell being positioned with respect to said source and said detector so that radiation from said source passes through said first member, said compartment and said second member to said detector.
Claim 7
Dependent Claim
56 words
The refractometer of claim 4, further comprising a first radiation-opaque member positioned centrally in the opening of said cell adjacent said source to reduce the amount of radiation entering said cell, and an annular radiation-opaque member positioned in the opening of said cell adjacent said detector to reduce the amount of radiation which reaches said detector.
Claim 8
Dependent Claim
39 words
The refractometer of claim 5, further comprising a second radiation detector spaced from said source, a second refractometer cell of similar construction positioned between said source and said second detector, and means to compare the outputs of said detectors.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |