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US4780241A
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Ferroelectric chiral smectic liquid crystal composition
Assignee: JNC Corp
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Filing: 1987-11-24
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Granted: 1988-10-25
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Expires: 2007-11-24
Abstract
Abstract A ferroelectric liquid crystal composition having a long helical pitch and a light switching element having a quick response property are provided. This composition comprises (1) at least one member selected from the group consisting of liquid crystal compounds having a smectic C phase and no helical structure and liquid crystal compounds having only a nematic phase as a liquid crystal phase and no helical structure and (2) at least one chiral smectic liquid crystal compounds.
Inventors
- 👤 Kenji Furukawa
- 👤 Kanetsugu Terashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:49
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/02; C09K19/0225; C09K19/46; C09K19/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A ferroelectric chiral smectic liquid crystal composition consisting of 1-30% by weight of at least one liquid crystal compound having only nematic phase as a liquid crystal phase and no helical structure and being expressed by the formula: ##STR109## wherein R 2 represents butyl or pentyl and R 3 represents ethyl or pentyl and 99-70% by weight of at least one chiral smectic compound selected from the group consisting of ##STR110##
Claim 2
Dependent Claim
71 words
A ferroelectric chiral smectic liquid crystal composition consisting of 1-30% by weight of at least one liquid crystal compound having only nematic phase as a liquid crystal phase and no helical structure and being expressed by the formula: ##STR109## wherein R 2 represents butyl or pentyl and R 3 represents ethyl or pentyl and 99-70% by weight of at least one chiral smectic compound selected from the group consisting of ##STR110##
Claim 3
Dependent Claim
16 words
A light-switching element comprising a ferroelectric chiral smectic liquid crystal composition as defined in claim 1.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |