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:
Jun. 15, 1982
Filed:
May. 29, 1981
Applicant:
Inventor:
Nicholas L Sethofer, San Jose, CA (US);
Assignee:
Timex Corporation, Waterbury, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ; C07D / ;
U.S. Cl.
CPC ...
2522991 ; 2522995 ; 25229961 ; 549369 ; 549372 ; 549374 ;
Abstract
Novel liquid crystalline compounds having low viscosity, low transition temperatures, positive dielectric anisotropy and extremely low optical birefringence are provided. The compounds are represented by the formula: ##STR1## where R and R.sup.1 can be the same or different straight chain alkyl or alkoxy group and m can be 1 or 2. Guest-host electrooptical displays including a mixture of one or more of the compounds with a suitable pleochroic dye exhibit much improved contrast and low driving voltage while eliminating the need for polarizers and excessive dye additions.