Patent US5157527A successfully refreshed from Google Patents.
US5157527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device comprising a color filter and top coat
Assignee: US Philips Corp
•
Filing: 1991-02-12
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Granted: 1992-10-20
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Expires: 2011-02-12
Abstract
Abstract Top coat (4, 6) for a color filter (3) which is hard enough to resist the pressure of spacers (13) and whose edges (6) are slanted in such a way that a satisfactory step coverage is possible, formed by means of a flexographic pressing method, is a cured acrylic resin.
Inventors
- 👤 Gerardus C. M. de Keyzer
- 👤 Antonius H. M. Raaijmakers
- 👤 Petrus E. M. Baltussen
- 👤 Henricus G. J. A. M. Luijben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133519
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
A device comprising a substrate provided with a color filter, at least part of the surface of which filter is provided with a top coating, said top coating comprising a cured acrylic resin and having a thickness which gradually decreased outwardly from said filter from the area of an edge of said filter.
Claim 2
Independent Claim
53 words
A device comprising a substrate provided with a color filter, at least part of the surface of which filter is provided with a top coating, said top coating comprising a cured acrylic resin and having a thickness which gradually decreased outwardly from said filter from the area of an edge of said filter.
Claim 3
Dependent Claim
74 words
An electro-optical device comprising a substrate provided with a color filter, at least part of the surface of which filter is provided with a top coating, said top coating comprising a cured acrylic resin and having a thickness which gradually decreases outwardly from said filter from the area of an edge of said filter and said device comprising a display medium provided between two supporting plates, one of said supporting plates being said substrate.
Claim 4
Dependent Claim
74 words
An electro-optical device comprising a substrate provided with a color filter, at least part of the surface of which filter is provided with a top coating, said top coating comprising a cured acrylic resin and having a thickness which gradually decreases outwardly from said filter from the area of an edge of said filter and said device comprising a display medium provided between two supporting plates, one of said supporting plates being said substrate.
Claim 5
Dependent Claim
23 words
A device as claimed in claim 2, characterized in that the top coat decreases in thickness with a slope of at most 30°.
Claim 6
Dependent Claim
16 words
A device as claimed in claim 3, characterized in that the slope is smaller than 5°.
Claim 7
Dependent Claim
22 words
A device as claimed in claim 2, characterized in that the top coat has a pencil hardness of at least 4 H.
Claim 8
Dependent Claim
22 words
A device as claimed in claim 2, characterized in that the top coat is substantially free from solvents for the acrylic resin.
Claim 9
Dependent Claim
19 words
A display device as claimed in claim 2, characterized in that the display medium comprises a liquid crystalline material.
Claim 10
Dependent Claim
22 words
A device as claimed in claim 3, characterized in that the top coat has a pencil hardness of at least 4 H.
Claim 11
Dependent Claim
22 words
A device as claimed in claim 4, characterized in that the top coat has a pencil hardness of at least 4 H.
Claim 12
Dependent Claim
22 words
A device as claimed in claim 3, characterized in that the top coat is substantially free from solvents for the acrylic resin.
Claim 13
Dependent Claim
22 words
A device as claimed in claim 4, characterized in that the top coat is substantially free from solvents for the acrylic resin.
Claim 14
Dependent Claim
22 words
A device as claimed in claim 5, characterized in that the top coat is substantially free from solvents for the acrylic resin.
Claim 15
Dependent Claim
34 words
An electro-optical device as claimed in claim 2 wherein the acrylic resin is formed from an acrylate selected from the group consisting of trimethylol propane triacrylate, pentaerythritol triacrylate and pentaerithrytol tetraacrylate and n-vinyl pyrrolidone.
Claim 16
Dependent Claim
34 words
An electro-optical device as claimed in claim 3 wherein the acrylic resin is formed from an acrylate selected from the group consisting of trimethylol propane triacrylate, pentaerythritol triacrylate and pentaerithrytol tetraacrylate and n-vinyl pyrrolidone.
Claim 17
Dependent Claim
34 words
An electro-optical device as claimed in claim 4 wherein the acrylic resin is formed from an acrylate selected from the group consisting of trimethylol propane triacrylate, pentaerythritol triacrylate and pentaerithrytol tetraacrylate and n-vinyl pyrrolidone.
Claim 18
Dependent Claim
34 words
An electro-optical device as claimed in claim 5 wherein the acrylic resin is formed from an acrylate selected from the group consisting of trimethylol propane triacrylate, pentaerythritol triacrylate and pentaerithrytol tetraacrylate and n-vinyl pyrrolidone.
Claim 19
Dependent Claim
34 words
An electro-optical device as claimed in claim 6 wherein the acrylic resin is formed from an acrylate selected from the group consisting of trimethylol propane triacrylate, pentaerythritol triacrylate and pentaerithrytol tetraacrylate and n-vinyl pyrrolidone.
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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) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |