US4780241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric chiral smectic liquid crystal composition
Assignee: JNC Corp
•
Filing: 1987-11-24
•
Granted: 1988-10-25
•
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 16:53
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.
References Cited (Backward Citations)
US4083797A
Cited
US4149413A
Cited
US4195916A
Cited
US4279770A
Cited
JPS57174375A
Cited
US4613209A
Cited
US4576732A
Cited
US4596667A
Cited
US4614609A
Cited
US4622165A
Cited
EP0136725A2
Cited
EP0156726A1
Cited
US4725688A
Cited
DE3525015A1
Cited
JPS6130559A
Cited
US4668427A
Cited
US4714323A
Cited
US4615586A
Cited
DE3515374A1
Cited
EP0206680A2
Cited
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 |