Patents by Inventor William P. Chatham

William P. Chatham 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).

  • Patent number: 6521683
    Abstract: Antistatic agents for reducing and eliminating static electric charges on resins, particularly acrylic resins, including an antistatically effective amount of at least one substituted imidazolinium salt of alkylbenzene sulfonic acid having the formula: wherein R1 and R2 are the same or different and are alkyl groups having 6 or more carbon atoms. Also contemplated are methods, compositions and articles of manufacture which include the above mentioned antistatic agent and are added to or on the resins and further contain fatty acids or optical brighteners.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: February 18, 2003
    Assignee: Witco Corporation
    Inventors: Roy Simmons, William P. Chatham, Michael L. Whitlock, James J. Ward
  • Patent number: 5491187
    Abstract: Methods for reducing or eliminating static electric charges on resins by adding to the resins an effective amount of at least one substituted ammonium salt of an alkylbenzene sulfonic acid, the salt having the formula: ##STR1## wherein R is a straight or branched chain alkyl group having from 10 to 14 carbon atoms, R.sub.1 is hydroxyethyl or an alkyl group having from one to six carbon atoms, R.sub.2 and R.sub.3 are the same or different and are hydroxyethyl, an alkyl group having from one to six carbon atoms, or hydrogen, and R.sub.4 is hydrogen or an alkyl group having from one to six carbon atoms, together with resins so produced and compositions additionally containing fatty acids for such use.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 13, 1996
    Assignee: Witco Corporation
    Inventors: James J. Ward, William P. Chatham
  • Patent number: 5468793
    Abstract: Methods for reducing or eliminating static electric charges on resins by adding to the resins an effective amount of at least one substituted ammonium salt of an alkylbenzene sulfonic acid, the salt having the formula: ##STR1## wherein R is a straight or branched chain alkyl group having from 10 to 14 carbon atoms, R.sub.1 is hydroxyethyl or an alkyl group having from one to six carbon atoms, R.sub.2 and R.sub.3 are the same or different and are hydroxyethyl, an alkyl group having from one to six carbon atoms, or hydrogen, and R.sub.4 is hydrogen or an alkyl group having from one to six carbon atoms, together with resins so produced and compositions additionally containing fatty acids for such use.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: November 21, 1995
    Assignee: Wico Corporation
    Inventors: James J. Ward, William P. Chatham