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.:
Date of Patent:
Apr. 06, 1982
Filed:
Jan. 19, 1981
Nicholas L Sethofer, San Jose, CA (US);
Timex Corporation, Waterbury, CT (US);
Abstract
Novel liquid crystalline compounds having low viscosity, high (N-I) transition temperatures, positive dielectric anisotropy and low optical birefringence are provided and are represented by the formula: ##STR1## where R and R.sup.1 can be the same or different straight chain alkyl or alkoxy group. Also disclosed are liquid crystalline admixtures having a broad nematic temperature range by virtue of the inclusion therein of the above-described compound. Typical admixtures of the invention include at least one compound of the above formula and at least one compound of the general formula ##STR2## or of the general formula ##STR3## where R.sub.1, R.sub.2 and R.sub.3 can be the same or different alkyl or alkoxy group. These admixtures exhibit low optical birefringence and are useful as the host material in a guest-host electrooptical display.