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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5494605 B1

PDFFull Text
Date of Patent:
Feb. 27, 1996

Filed:

Nov. 24, 1993

P-terphenyl derivatives and liquid crystalline compositions

Applicant:
Inventors:

Makoto Kurihara, Soka, JP;

Hiromi Inoue, Soka, JP;

Atsushi Sugiura, Soka, JP;

Kenji Suzuki, Soka, JP;

Tsunenori Fujii, Soka, JP;

Assignee:

Kanto Kagaku Kabushiki Kaisha, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch

Primary Examiner:

Philip Tucker

Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25229966 ; 560 59 ; 560 65 ; 560141 ; 568642 ; 568661 ; 570129 ;
Abstract

The p-terphenyl derivatives of the formula shown below are useful in preparing practical ferroelectric liquid crystalline compositions. The derivatives exhibit excellent chemical stability and display the chiral smectic C or smectic C phase over a wide temperature range. ##STR1## wherein each of R.sub.1 and R.sub.2 is a straight or branched chain alkyl group having 1-18 carbon atoms; each of Y and Z is a single bond, O, COO or OCO; and any two of X.sub.1, X.sub.2, and X.sub.3 are fluorine atoms and the remainder is a hydrogen atom.

Find Patent Forward Citations

Kurihara, Makoto. (1996). P-terphenyl derivatives and liquid crystalline compositions (U.S. Patent No. 5494605). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5494605

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