Patent US2548624A successfully refreshed from Google Patents.
Patent US4902592A successfully refreshed from Google Patents.
US4902592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of color display
Assignee: Sharp Corp
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Filing: 1988-07-18
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Granted: 1990-02-20
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Expires: 2008-07-18
Abstract
Abstract A process for preparing a color display comprising the following steps: (a) preparing an uncolored base plate comprising a base plate, an electroconductive layer formed on said base plate and a photosensitive resin layer formed thereon, said photosensitive resin layer being patterned by exposing to light through a mask and developing it to let a portion of the electroconductive layer to be colored appear, (b) forming a color layer by electrodeposition on the portion of the electroconductive layer to be colored, (c) transferring the color layer onto a transfer plate, and (d) further transferring and fixing the color layer onto a transparent substrate from the transfer plate, wherein if the color display is colored with more than one color, the processes (a) to (d) are repeated for the other colors, but once said uncolored base plate is formed, the processes (b) to (d) are repeated.
Inventors
- 👤 Akira Matsumura
- 👤 Masashi Ohata
- 👤 Katsukiyo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133516
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A process for preparing a color display comprising the following steps: (a) preparing an uncolored base plate comprising a base plate, an electroconductive layer formed on said base plate and a photosensitive resin layer formed on said electroconductive layer, said photosensitive resin layer being patterned by exposing it to light through a mask and developing it to let a portion of the electroconductive layer to be colored appear, (b) forming a color layer by electrodeposition on the portion of the electroconductive layer to be colored, (c) transferring the color layer onto a transfer plate, and (d) further transferring and fixing the color layer onto a transparent substrate from the transfer plate, wherein when the color display is colored with only one color, the step (c) is omitted to directly transfer the color layer onto the transparent substrate.
Claim 2
Dependent Claim
137 words
A process for preparing a color display comprising the following steps: (a) preparing an uncolored base plate comprising a base plate, an electroconductive layer formed on said base plate and a photosensitive resin layer formed on said electroconductive layer, said photosensitive resin layer being patterned by exposing it to light through a mask and developing it to let a portion of the electroconductive layer to be colored appear, (b) forming a color layer by electrodeposition on the portion of the electroconductive layer to be colored, (c) transferring the color layer onto a transfer plate, and (d) further transferring and fixing the color layer onto a transparent substrate from the transfer plate, wherein when the color display is colored with only one color, the step (c) is omitted to directly transfer the color layer onto the transparent substrate.
Claim 3
Dependent Claim
16 words
The process according to claim 1 wherein the base plate is made from glass or plastic.
Claim 4
Dependent Claim
22 words
The process according to claim 1 wherein the electroconductive layer is formed from copper, silver, indium tin oxide, gold, platinum or nickel.
Claim 5
Dependent Claim
16 words
The process according to claim 1 wherein the photosensitive resin layer is negative or positive type.
Claim 6
Dependent Claim
40 words
The process according to claim 1 wherein the transferring step (c) is carried out by contacted the surface of the color layer with the surface of the transfer plate and pressing by a rubber plate or a rubber covered roller.
Claim 7
Dependent Claim
31 words
The process according to claim 1 wherein the transfer plate is a polyethylene terephthalate film, a cellulose triacetate film, a polystyrene film, a polycarbonate film or a polymer-laminated paper or glass.
Claim 8
Dependent Claim
42 words
The process according to claim 1, wherein steps (a) to (d) are repeated using a different color for the color layer than in the first series of steps (a) to (d), to prepare a color display colored with more than one color.
References Cited (Backward Citations)
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US4639088A
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |