US4837058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal cell
Assignee: Stanley Electric Co Ltd
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Filing: 1987-08-19
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Granted: 1989-06-06
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Expires: 2007-08-19
Abstract
Abstract There is disclosed an improved liquid crystal cell wherein liquid crystal material is sealed between opposing transparent substrates and particles of particulate material are disposed on the transparent substrate thereby defining a uniform substrate interval and wherein the particulate material is disposed in a plurality of areas of less than 100 mm 2 with void areas defined between the areas of particulate material.
Inventors
- 👤 Masanobu Aizawa
- 👤 Shigekazu Yamauchi
- 👤 Yuzo Hisatake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13394; G02F1/13392
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
An improved liquid crystal cell, which comprises: a liquid crystal material sealed between opposing transparent substrates; and particulate material provided between said transparent substrates comprised of particles to define spacing therebetween, said particulate material being contained in spaced-apart areas of less than 100 mm 2 defining open areas therebetween, said areas of particulate material being spaced-apart a distance of at least about 2 mm.
Claim 2
Dependent Claim
64 words
An improved liquid crystal cell, which comprises: a liquid crystal material sealed between opposing transparent substrates; and particulate material provided between said transparent substrates comprised of particles to define spacing therebetween, said particulate material being contained in spaced-apart areas of less than 100 mm 2 defining open areas therebetween, said areas of particulate material being spaced-apart a distance of at least about 2 mm.
Claim 3
Dependent Claim
21 words
The liquid crystal cell as claimed in claim 1 wherein said areas of particulate material are of circular or polygonal shape.
Claim 4
Dependent Claim
27 words
The liquid crystal cell as claimed in claims 1 or 2 wherein said particles of particulate material are of an average size of 1 mm or less.
References Cited (Backward Citations)
US4341445A
Cited
US4603947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |