Patents by Inventor Sue H. Graham

Sue H. Graham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid crystal polymer composition containing bisphenol A in combination with 4,4'-thiodiphenol
    Patent number: 5173562
    Abstract: The invention relates to thermotropic liquid crystalline polymer compositions of the general formula:--(CO--C.sub.6 H.sub.4 O).sub.m --(CO--C.sub.6 H.sub.4 --CO).sub.n--(O--C.sub.6 H.sub.4 --X).sub.p --(O--C.sub.6 H.sub.4 --C(CH.sub.3).sub.2 --C.sub.6 H.sub.4 --O).sub.q --(O--C.sub.6 H.sub.4 --S--C.sub.6 H.sub.4 --O).sub.t --where substantially all aromatic substituents are para to one another, where--X-- can be either --O-- or --NH--, andm, n, p, q and t are mole fractions totaling 1.0,wherem is 0 to 0.75,m plus 2p is 0.5 to 0.75,n is 0.125 to 0.5,p is 0 to 0.375,q is 0.125 to 0.25,n equals p plus q plus t, andt is greater than 0.0125, but equal to no greater than 90% of q plus t.Preferably X is --O--, m is from 0.5 to 0.75 and p is less than 0.05. Alternatively, m is less than 0.1 and p is from 0.25 to 0.375.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: December 22, 1992
    Assignee: Chisso America Inc.
    Inventors: Donald R. Wilson, Edgar A. Blair, Sue H. Graham