Patents by Inventor Joy L. McCrickard

Joy L. McCrickard 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).

  • Process for preparing crosslinked water absorbent resins
    Patent number: 5478894
    Abstract: This invention is directed to a recurring polymeric moiety of the following formula: ##STR1## wherein R is independently selected from hydrogen and C.sub.1 to C.sub.4 alkyl; Y is independently selected from O and NH; and X is independently selected from Cl, F, Br, I, NO.sub.3, HSO.sub.4 and H.sub.2 PO.sub.4.Polymers of the above structure may be crosslinked by treating the polymer with a base and heating it.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: December 26, 1995
    Assignee: Hoechst Celanese Corporation
    Inventors: William G. Chiang, Joy L. McCrickard