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. 29, 1986
Filed:
Apr. 23, 1984
Applicant:
Inventors:
Dietrich Demus, Halle, DD;
Horst Zaschke, Halle, DD;
Sabine Richter, Haldensleben, DD;
Hans-Joachim Deutscher, Halle, DD;
Adelbert Wiegeleben, Halle, DD;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C07C / ; C07C / ; C07C / ; G02F / ;
U.S. Cl.
CPC ...
25229962 ; 2522995 ; 558414 ; 558406 ; 558401 ; 3503 / ; 560-5 ; 560102 ; 560116 ; 560117 ; 562403 ;
Abstract
What is described is an improved opto-electronic component and display which uses novel liquid crystal nematic substances for the control of the light transmission and for the display of numbers symbols and images. The novel nematic liquid crystal substances herein, which exhibit high clearing temperatures, low working temperatures and rapid switching times, are 7-alkyl-perhydrophenanthren-2-carboxylic acids and esters thereof.