Patent US3861802A successfully refreshed from Google Patents.
US3861802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An improved turbidimeter lens for reducing the tendency of mixtures of immiscible fluids to form films of the lenses
Assignee: ConocoPhillips Co
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Filing: 1973-07-02
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Granted: 1975-01-21
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Expires: 1993-07-02
Abstract
Abstract In a turbidimeter for determining the turbidity of liquids, the improvement comprising separating the light source and the light sensor from the liquids by covering the light source and light sensor with a fluorocarbon resin.
Inventors
- 👤 Jr Clinton A Belmear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/534
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
In a turbidimeter having a light source and a light sensor for determining the turbidity of liquids, the improvement comprising separating said light source and said light sensor from said liquids with a fluorocarbon resin lens which allows the passage of light therethrough, thereby minimizing the tendency of said liquids to form films on said lenses.
Claim 2
Dependent Claim
56 words
In a turbidimeter having a light source and a light sensor for determining the turbidity of liquids, the improvement comprising separating said light source and said light sensor from said liquids with a fluorocarbon resin lens which allows the passage of light therethrough, thereby minimizing the tendency of said liquids to form films on said lenses.
Claim 3
Dependent Claim
13 words
The improvement of claim 1 wherein said liquids comprise mixtures of immiscible fluids.
Claim 4
Dependent Claim
15 words
The improvement of claim 2 wherein said light source and said light sensor are parallel.
Claim 5
Dependent Claim
15 words
The improvement of claim 2 wherein said light source is directed toward said light sensor.
Claim 6
Dependent Claim
12 words
The improvement of claim 2 wherein said liquids contain oil and water.
Claim 7
Dependent Claim
11 words
The improvement of claim 2 wherein said fluorocarbon resin is polytetrafluoroethylene.
Claim 8
Dependent Claim
60 words
In a turbidimeter having a light source and a light sensor for determining the turbidity of liquids, the improvement comprising separating said light source and said light sensor from said liquids with a transparent lens coated with a fluorocarbon resin which allows the passage of light therethrough, thereby minimizing the tendency of said liquids to form films on said lenses.
Claim 9
Dependent Claim
60 words
In a turbidimeter having a light source and a light sensor for determining the turbidity of liquids, the improvement comprising separating said light source and said light sensor from said liquids with a transparent lens coated with a fluorocarbon resin which allows the passage of light therethrough, thereby minimizing the tendency of said liquids to form films on said lenses.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |