Patent EP0339987A2 successfully refreshed from Google Patents.
EP0339987A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal compounds having naphthalene nucleus
Assignee: Showa Shell Sekiyu KK
•
Filing: 1989-04-26
•
Granted: —
•
Expires: 2009-04-26
Abstract
Abstract Novel ferroelectric liquid crystal compounds which may realize a stable molecular orientation which makes it possible to give a definite light-dark contrast in the no electric field state and attain a definite threshold property as well as hysterisis, and for making it possible to attain the dynamic drivinng as well as the high speed of response, owing to tri-stable phase thereof, of the general formulae (I) and (II) in which R₁ means an alkyl, alkoxy or alkyloxycarbonyl each of 1-20 carbon atoms, R₂ means optically active
Inventors
- 👤 Yoshiichi C/O Showa Shell Sekiyu K.K. Suzuki
- 👤 Ichiro C/O Showa Shell Sekiyu K.K. Kawamura
- 👤 Takashi C/O Showa Shell Sekiyu K.K. Hagiwara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:28
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/0266; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/32; C09K19/322
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
Liquid crystal compounds of naphthalene nucleus represented by the general formula in which R₁ means an alkyl, alkoxy or alkyloxycarbonyl group respectively of 1 - 20 carbon atoms, R₂ means optically active
Claim 2
Dependent Claim
32 words
Liquid crystal compounds of naphthalene nucleus represented by the general formula in which R₁ means an alkyl, alkoxy or alkyloxycarbonyl group respectively of 1 - 20 carbon atoms, R₂ means optically active
Claim 3
Dependent Claim
11 words
Liquid crystal compouds of naphthalene nucleus represented by the general formula
Claim 4
Dependent Claim
11 words
Liquid crystal compouds of naphthalene nucleus represented by the general formula
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.