Patent US4493024A successfully refreshed from Google Patents.
Patent US4060654A successfully refreshed from Google Patents.
US4060654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamellar pellicle for thermography
Assignee: Individual
•
Filing: 1976-08-16
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Granted: 1977-11-29
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Expires: 1996-08-16
Abstract
Abstract The disclosure is of a composite lamellar pellicle for producing thermographic patterns by means of liquid crystals which are spread upon an inner sheet and sandwiched between two outer sheets both of which have adequate mechanical strength for normal handling and at least one of which is transparent, all three layers preferably being poor conductors of heat and flexible without being elastic.
Inventors
- 👤 Yves Quenneville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:46
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; A61B2562/00; A61B2562/02; A61B2562/0271; A61B2562/0276; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A temperature-responsive lamellar flexible pellicle for producing thermographic displays, comprising in combination a transparent inner sheet, a covering of liquid crystals which change color with temperature upon said inner sheet, an opaque inner backing sheet covering said crystals, an outer backing sheet covering said inner backing sheet, a transparent outer front sheet covering said transparent inner sheet, said outer backing sheet and said outer front sheet being of material having mechanical strength and being secured to each other by adhesive at their marginal zones, and a stiff rectangular frame in which said pellicle is mounted.
Claim 2
Dependent Claim
95 words
A temperature-responsive lamellar flexible pellicle for producing thermographic displays, comprising in combination a transparent inner sheet, a covering of liquid crystals which change color with temperature upon said inner sheet, an opaque inner backing sheet covering said crystals, an outer backing sheet covering said inner backing sheet, a transparent outer front sheet covering said transparent inner sheet, said outer backing sheet and said outer front sheet being of material having mechanical strength and being secured to each other by adhesive at their marginal zones, and a stiff rectangular frame in which said pellicle is mounted.
Claim 3
Dependent Claim
35 words
A pellicle as claimed in claim 1, characterised in that its external surface is transparent and is of a material which allows yellow colours to emerge with the least possible amount of the blue colours.
Claim 4
Dependent Claim
22 words
A pellicle as claimed in claim 1, characterised in that its external surface is made of a material which absorbs ultraviolet radiation.
Claim 5
Dependent Claim
26 words
A pellicle as claimed in claim 1, characterised in that the constituent material of the frame has a thermal conductivity close to that of the skin.
Claim 6
Dependent Claim
15 words
A pellicle as claimed in claim 1, in which said frame is of molded material.
Claim 7
Dependent Claim
23 words
A pellicle as claimed in claim 1, in which said frame is in two pieces secured together with said marginal zones between them.
Claim 8
Dependent Claim
42 words
A pellicle as claimed in claim 1, there being a superposed plurality of said transparent inner sheets each with a covering of liquid crystals, the liquid crystals of the various sheets being reactive to temperatures in different ranges, the pellicle being flat.
References Cited (Backward Citations)
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |