Patents by Inventor Rex L. Bobstein

Rex L. Bobstein 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).

  • Random copolymers of poly(arylene sulfide)s and process therefor
    Patent number: 5268449
    Abstract: A random copolymer composed of at least one arylene sulfide segment and at least one arylene aulfide sulfone segment is prepared by contacting at least one dihaloaromatic sulfide having a formula of X--Ar(R).sub.n --S--Ar.sup.1 (R.sup.1).sub.n --X.sup.1, with a mixture comprising at least one sulfur source and at least one dihaloaromatic sulfone having a formula of X.sup.2 --Ar.sup.2 (R.sup.2).sub.n --S(O.sub.2)--Ar.sup.3 (R.sup.3).sub.n --X.sup.3 in the presence of a polar organic compound under polymerization conditions to synthesize a random copolymer; where X, X.sup.1, X.sup.2, and X.sup.3 can be the same or different halogens and are each selected from the group consisting of fluorine, chlorine, bromine and iodine; Ar, Ar.sup.1, Ar.sup.2, and Ar.sup.3 are each an arylene group; R, R.sup.1, R.sup.2, and R.sup.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: December 7, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Dwayne R. Senn, Rex L. Bobstein, Owen H. Decker, Carlton E. Ash, Darryl R. Fahey, Jon F. Geibel