US4640584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacers for liquid crystal display device
Assignee: Nippon Shokubai Co Ltd
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Filing: 1985-03-22
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Granted: 1987-02-03
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Expires: 2005-03-22
Abstract
Abstract Spacers for a liquid crystal display device, which comprise fine spherical cured particles of amino resin obtained from formaldehyde and at least one amino compound selected from the group consisting of benzoguanamine, melamine and urea.
Inventors
- 👤 Tsuneo Tsubakimoto
- 👤 Iwao Fujikawa
- 👤 Mitsuo Kushino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392; G02F1/1341; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/055
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A liquid crystal display device, comprising two transparent substrates each provided on the inner side thereof with a transparent electrode, liquid crystal sealed in a space formed between said two transparent substrates, and fine spherical cured particles formed of amino resin obtained from formaldehyde and at least one amino compound selected from the group consisting of benzoguanamine, melamine and urea, and disposed at least in the inner peripheral portion of said two transparent substrates as mixed with an adhesive sealing agent.
Claim 2
Dependent Claim
81 words
A liquid crystal display device, comprising two transparent substrates each provided on the inner side thereof with a transparent electrode, liquid crystal sealed in a space formed between said two transparent substrates, and fine spherical cured particles formed of amino resin obtained from formaldehyde and at least one amino compound selected from the group consisting of benzoguanamine, melamine and urea, and disposed at least in the inner peripheral portion of said two transparent substrates as mixed with an adhesive sealing agent.
Claim 3
Dependent Claim
19 words
A liquid crystal display device according to claim 1, wherein said amino resin is benzoguanamine-formaldehyde resin or benzoguanamine-melamine-formaldehyde resin.
Claim 4
Dependent Claim
27 words
A liquid crystal display device according to claim 1, wherein said fine spherical particles have an average particle diameter in the range of 1 to 15 μm.
Claim 5
Dependent Claim
16 words
A liquid crystal display device according to claim 3, wherein said amino resin is benzoguanamine-melamine-formaldehyde resin.
Claim 6
Dependent Claim
21 words
A liquid crystal display device according to claim 1, wherein said adhesive sealing agent is a thermosetting type resin adhesive agent.
Claim 7
Dependent Claim
23 words
A liquid crystal display device according to claim 1, wherein said thermosetting resin type adhesive agent is an epoxy resin type adhesive agent.
Claim 8
Dependent Claim
28 words
A liquid crystal display device according to claim 1, which further comprises fine spherical cured particles disposed between said two transparent substrates other than in said peripheral portion.
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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |