US3836231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uniform liquid crystal cells and method for making the same
Assignee: LXD Inc
•
Filing: 1973-08-06
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Granted: 1974-09-17
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Expires: 1993-08-06
Abstract
Abstract Liquid crystal displays with uniformly clear appearance and long lifetimes are described as comprising thin inert coatings applied to the surface of substrates which may include conductive layers thereon. The inert coatings advantageously are insoluble in the nematic liquid, adhere to the conductive layer and substrate and are substantially transparent. Suitable materials for the inert coating include vinyl acetate resins, ethylene-based resins, epoxies, anaerobic adhesives, polyimides and linear saturated polyesters, for example.
Inventors
- 👤 H Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
The improvement of claim 1 wherein said inert polymeric coating has a thickness of between approximately 20 and 2,000 A.
Claim 2
Dependent Claim
22 words
The improvement of claim 1 wherein said inert polymeric coating is a vinyl resin including 27 to 29 percent of vinyl acetate.
Claim 3
Dependent Claim
17 words
The improvement of claim 1 wherein said inert polymeric coating is a linear, saturated polyester polymer material.
Claim 4
Dependent Claim
14 words
The improvement of claim 1 wherein said inert polymeric coating is an anaerobic adhesive.
Claim 5
Dependent Claim
15 words
The improvement of claim 1 wherein said inert polymeric coating is a substantially clear epoxy.
Claim 6
Independent Claim
70 words
A method for making a uniformly clear nematic liquid crystal display device, said method comprising the step of: applying an inert polymeric coating to at least two substrates, each substrate having a conductive coating on at least a portion of said substrate; placing said substrates in substantially parallel relation with a spacing of between approximately 5 and 100 microns therebetween; and sealing a nematic liquid crystal material in said space.
Claim 7
Dependent Claim
29 words
The method of claim 7 wherein said inert polymeric coating has a thickness of between approximately 20 and 2,000 A and is substantially insoluble in said liquid crystal material.
Claim 8
Dependent Claim
17 words
The method of claim 7 wherein said inert polymeric coating is applied by spin-coating from a solution.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein said inert polymeric coating is substantially transparent, substantially insoluble in the liquid crystal material and adheres to the substrate.
References Cited (Backward Citations)
US3597043A
Cited
US3694053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |