Patents by Inventor Gregory F. Helma

Gregory F. Helma 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).

  • Polyether polyols suitable for flexible polyurethane foam prepared by co-initiation of aqueous solutions of solid polyhydroxyl initiators
    Patent number: 5652279
    Abstract: Polyoxyalkylene polyether polyols suitable for preparation of flexible polyurethane foams are prepared by oxyalkylating an aqueous solution of one or more polyhydric, hydroxyl-functional solid initiators under conditions where both water as well as initiator are oxyalkylated. The polyols have calculated functionalities of between about 2.2 and 4.0 and hydroxyl numbers in the range of 10 to 180. The polyols may be used to prepare soft, high resiliency polyurethane flexible foams at low isocyanate indexes.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: July 29, 1997
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Stanley L. Hager, James E. Knight, Gregory F. Helma, Ben J. Argento
  • Polyether polyols suitable for mflexible polyurethane foam prepared by co-initiation of aqueous solutions of solid polyhydroxyl initiators
    Patent number: 5596059
    Abstract: Polyoxyalkylene polyether polyols suitable for preparation of flexible polyurethane foams are prepared by oxyalkylating an aqueous solution of one or more polyhydric, hydroxyl-functional solid initiators under conditions where both water as well as initiator are oxyalkylated. The polyols have calculated functionalities of between about 2.2 and 4.0 and hydroxyl numbers in the range of 10 to 180. The polyols may be used to prepare soft, high resiliency polyurethane flexible foams at low isocyanate indexes.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: January 21, 1997
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Stanley L. Hager, James E. Knight, Gregory F. Helma, Ben J. Argento