US4422727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lacquer, with inorganic filler, coating display-element's polarizer
Assignee: Mannesmann VDO AG
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Filing: 1980-10-16
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Granted: 1983-12-27
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Expires: 2000-10-16
Abstract
Abstract A passive electro-optical indicating element for displaying information, such as alpha-numerical characters having two spaced, transparent electrode supports which together enclose a liquid crystal substance and are provided on their surfaces opposite said liquid crystal substance with respective polarizers, have the surface facing the observer of the polarizer located on the front electrode support coated with a thin layer of a transparent curable lacquer, in which inorganic fillers are suspended in the prepared lacquer in an amount between 2 and 10 percent by weight.
Inventors
- 👤 Holm Baeger
- 👤 Hans Wedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/111; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133502; G02F1/133528
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A passive electro-optical indicating element for displaying information such as alphabetical and numerical characters, comprising: a front transparent electrode support; a back transparent electrode support, which together with said front transparent electrode support defines a cavity; a liquid crystal substance enclosed in said cavity formed by said front and back transparent electrode supports; a polarizer arranged on the surface of each said front and back transparent electrode supports opposite said liquid crystal substance; a thin coating of a transparent curable lacquer applied to the outside surface of the polarizer arranged on said front electrode support, said coating of a transparent curable lacquer including an inorganic filler of silicon dioxide suspended therein in an amount between 2 and 10 percent by weight of the prepared lacquer.
Claim 2
Dependent Claim
125 words
A passive electro-optical indicating element for displaying information such as alphabetical and numerical characters, comprising: a front transparent electrode support; a back transparent electrode support, which together with said front transparent electrode support defines a cavity; a liquid crystal substance enclosed in said cavity formed by said front and back transparent electrode supports; a polarizer arranged on the surface of each said front and back transparent electrode supports opposite said liquid crystal substance; a thin coating of a transparent curable lacquer applied to the outside surface of the polarizer arranged on said front electrode support, said coating of a transparent curable lacquer including an inorganic filler of silicon dioxide suspended therein in an amount between 2 and 10 percent by weight of the prepared lacquer.
Claim 3
Dependent Claim
16 words
An indicating element as claimed in claim 1, wherein said lacquer is an alkyd resin lacquer.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |