Patents by Inventor Mark E. Wagman

Mark E. Wagman 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).

  • Polyacetal compositions containing a non-meltable polymer stabilizer improved with at least one amide-containing phenolic antioxidant
    Patent number: 4972014
    Abstract: Incorporation into polyacetal molding compositions stabilized with a non-meltable polymer stabilizer of 0.02-1.0 weight percent of at least one amide-containing phenolic antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: November 20, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard A. Hayes, Leonard E. R. Kosinski, Mark E. Wagman
  • Stabilized polyoxymethylene compositions
    Patent number: 4640949
    Abstract: Polyoxymethylene compositions are stabilized by a blend of thermoplastic polyurethane with polyamide where the polyamide is dispersed throughout the polyurethane as a separate phase having substantially all of the polyamide particles with a diameter of less then six microns and where the polyamide comprises 0.2 to 5 weight percent based on the quantity of polyoxymethylene.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: February 3, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Mark E. Wagman