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:
Aug. 15, 1989
Filed:
Jul. 02, 1987
Applicant:
Inventors:
Timothy G Adams, Allston, MA (US);
Roger F Sinta, Woburn, MA (US);
Assignee:
Polaroid Corporation Patent Department, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; G02F / ;
U.S. Cl.
CPC ...
25229965 ; 25229901 ; 3503 / ;
Abstract
Mixtures of liquid crystal compounds from among different classes of liquid crystal ester compounds are disclosed. The mixtures exhibit freezing points substantially lower than the freezing point of either ester compound alone, so as to provide a substantially improved (widened) smectic C mesomorphic temperature range and protection against freezing or crystallization of liquid crystal material over a range of temperatures at which an electrooptic display device would typically be operated.