Patent US1677822A successfully refreshed from Google Patents.
Patent US4924084A successfully refreshed from Google Patents.
US4924084A
Expired / Lapsed
US
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Device for determining surface moisture
Assignee: Hoechst AG
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Filing: 1988-10-13
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Granted: 1990-05-08
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Expires: 2008-10-13
Abstract
Abstract A device for determining surface moisture, especially of absorbent materials, comprises a Dove reflection prism, a radiation source of such a design that its beams, which are aligned parallel, perpendicularly strike one of the two small surfaces of the prism, a light trap which traps the light beams emanating from the other small surface, and a photoelectric transducer which is located in the angle formed by the two small surfaces and is arranged such that its measurement surface is located parallel and opposite to the hypotenuse surface of the prism.
Inventors
- 👤 Helmut Lask
- 👤 Arno Holst
- 👤 Kurt Dryczynski, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/43; G01N21/84; G01N2021/8405; Y; Y10; Y10S; Y10S250/00; Y10S250/90; Y10S250/901; Y10S250/902; Y10S250/903
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A device for determining surface moisture, which comprises a Dove reflection prism (1), a radiation source (2) of such a design that its beams (2a), which are aligned parallel, perpendicularly strike one of the two small surfaces (3) of the prism, a light trap (4) which traps the light beams (2c) emanating from the other small surface (5), and a photoelectric transducer (10) which is located in the angle formed by the two small surfaces and is arranged such that its measurement surface is located parallel and opposite to the hypotenuse surface of the prism, and which converts the light (2b) scattered by the surface which is to be measured.
Claim 2
Independent Claim
110 words
A device for determining surface moisture, which comprises a Dove reflection prism (1), a radiation source (2) of such a design that its beams (2a), which are aligned parallel, perpendicularly strike one of the two small surfaces (3) of the prism, a light trap (4) which traps the light beams (2c) emanating from the other small surface (5), and a photoelectric transducer (10) which is located in the angle formed by the two small surfaces and is arranged such that its measurement surface is located parallel and opposite to the hypotenuse surface of the prism, and which converts the light (2b) scattered by the surface which is to be measured.
Claim 3
Independent Claim
123 words
A device for determining surface moisture, which comprises a cuboid block (11) having two opposite parallel sides, a flat bottom surface and a top surface parallel to the bottom surface, two prisms (12 and 12'), one attached to each of the two opposite sides of the cuboid block, a radiation source (2) of such a design that its beams (2a), which are aligned parallel, perpendicularly strike one of the two prisms, and a photoelectric transducer (10) which is located in the angle formed by the two prisms and is arranged such that its measurement surface is located parallel and opposite to the bottom surface of the cuboid block, and which converts the light (2b) scattered by the surface which is to be measured.
Claim 4
Independent Claim
123 words
A device for determining surface moisture, which comprises a cuboid block (11) having two opposite parallel sides, a flat bottom surface and a top surface parallel to the bottom surface, two prisms (12 and 12'), one attached to each of the two opposite sides of the cuboid block, a radiation source (2) of such a design that its beams (2a), which are aligned parallel, perpendicularly strike one of the two prisms, and a photoelectric transducer (10) which is located in the angle formed by the two prisms and is arranged such that its measurement surface is located parallel and opposite to the bottom surface of the cuboid block, and which converts the light (2b) scattered by the surface which is to be measured.
References Cited (Backward Citations)
US3120125A
Cited
US3487069A
Cited
GB1151301A
Cited
US3882887A
Cited
US4699516A
Cited
US4788444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |