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:
Jan. 29, 1991
Filed:
Jan. 26, 1989
Applicant:
Inventors:
Gerd Heppke, Berlin, DE;
Feodor Oestreicher, Berlin, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25229963 ; 25229901 ; 25229962 ; 25229964 ; 25229965 ; 25229966 ; 25229967 ; 3503 / ; 3503 / ;
Abstract
The twistable liquid crystal phases contain at least two chiral compounds (admixtures), at least one exhibiting helix inversion and at least one other having a high twisting capacity. With the aid of this combination of chiral compounds possessing certain properties, it is possible to effect temperature compensation with a relatively small amount of added admixtures.
Heppke, Gerd. (1991). Liquid crystal phase containing admixtures which effect temperature (U.S. Patent No. 4988458). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4988458
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