Patent US4101696A successfully refreshed from Google Patents.
US4101696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermographic plate for measuring temperature distributions
Assignee: Troponwerke Dinklage and Co
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Filing: 1976-07-30
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Granted: 1978-07-18
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Expires: 1996-07-30
Abstract
Abstract The thermographic plate consists of a carrier film, a latex-based optically inhomogeneous black layer applied thereto and of a layer containing liquid crystals. The thickness of the black layer amounts to between 4 and 18 μm. By virtue of this coordination of the thickness parameters, particularly high color intensity and hence correspondingly high image quality are obtained in the diagnosis of thermal anomalies.
Inventors
- 👤 Friedrich Jennen
- 👤 Jean Tricoire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:59
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/01; A61B5/015; B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/281; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A thermographic plate with an overal thickness of less than 200 μm consisting of a transparent carrier film, an intermediate latex-based black layer on said film and a layer containing liquid crystals disposed on the intermediate layer, the improvement comprising the black layer having an average thickness in the range of 4-18 μm and comprising an irregular array of individual black islands produced by spray coating a plurality of successive spray coats of latex with intermediate drying on the otherwise transparent carrier film, to provide a statistically fluctuating transparency.
Claim 2
Dependent Claim
89 words
A thermographic plate with an overal thickness of less than 200 μm consisting of a transparent carrier film, an intermediate latex-based black layer on said film and a layer containing liquid crystals disposed on the intermediate layer, the improvement comprising the black layer having an average thickness in the range of 4-18 μm and comprising an irregular array of individual black islands produced by spray coating a plurality of successive spray coats of latex with intermediate drying on the otherwise transparent carrier film, to provide a statistically fluctuating transparency.
Claim 3
Dependent Claim
36 words
A thermographic plate as claimed in claim 1, wherein the black layer is built up from 4 to 6 coats of latex of which each coat has a layer thickness of from 1 to 3 μm.
Claim 4
Dependent Claim
32 words
A thermographic plate as claimed in claim 2, wherein the latex consists of a copolymer of methacrylic acid methyl ester and acrylic acid ethyl ester with carbon black added as black pigment.
Claim 5
Dependent Claim
32 words
A thermographic plate as claimed in claim 1, wherein the latex consists of a copolymer of methacrylic acid methyl ester and acrylic acid ethyl ester with carbon black added as black pigment.
Claim 6
Dependent Claim
28 words
A thermographic plate as claimed in claim 4, wherein the layer containing liquid crystals is thicker than the black layer by a factor of from 2 to 6.
Claim 7
Dependent Claim
28 words
A thermographic plate as claimed in claim 1, wherein the layer containing liquid crystals is thicker than the black layer by a factor of from 2 to 6.
Claim 8
Dependent Claim
47 words
A thermographic plate as claimed in claim 6, wherein the carrier film has a thickness of from 5.8 to 10 μm, the black layer has a thickness of from 4 to 12 μm and the liquid cyrstal layer has a thickness of from 20 to 40 μm.
Claim 9
Dependent Claim
47 words
A thermographic plate as claimed in claim 1, wherein the carrier film has a thickness of from 5.8 to 10 μm, the black layer has a thickness of from 4 to 12 μm and the liquid crystal layer has a thickness of from 20 to 40 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |