Patents by Inventor Francis Xavier O'Shea

Francis Xavier O'Shea 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).

  • Polymerization catalyst promoter
    Patent number: 5786504
    Abstract: Compounds of the formula: ##STR1## wherein n is 1, 2, 3, or 4;X.sup.1 and X.sup.2 are each, independently, chlorine or bromine;A is O or S;R.sup.1 is hydrogen or C.sub.1 -C.sub.16 alkyl;R.sup.2 is C.sub.1 -C.sub.16 alkyl, C.sub.6 -C.sub.16 aryl, C.sub.1 -C.sub.4 alkylidene, or CH.sub.2 OR.sup.5 ;R.sup.3 is hydrogen, chlorine, bromine, or OR.sup.6 ;R.sup.4 is C.sub.1 -C.sub.16 alkyl, C.sub.7 -C.sub.16 aralkyl, C.sub.2 -C.sub.16 alkenyl, or C.sub.6 -C.sub.18 aryl;R.sup.5 is hydrogen, C.sub.1 -C.sub.16 alkyl, C.sub.7 -C.sub.16 aralkyl, C.sub.2 -C.sub.16 alkenyl, or C.sub.6 -C.sub.18 aryl; andR.sup.6 is hydrogen or C.sub.1 -C.sub.16 alkyl.These compounds by themselves and in combination with certain halo-but-2-enoic acids and esters are useful as catalyst promoters in ethylene polymerization processes.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: July 28, 1998
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Walter Nudenberg, Catherine Ann McGeary, Xu Wu Feng, Francis Xavier O'Shea