Patents by Inventor Ralph A. Guyer

Ralph A. Guyer 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).

  • Heat resistant composition of polyphenylene ether and/or polystyrene block copolymer(s) and styrenic grafted propylene polymer
    Patent number: 5370813
    Abstract: Disclosed are resin compositions comprising (a) a polyphenylene ether resin, a styrene resin or mixtures thereof, (b) a styrenic grafted propylene polymer material, (c) one or more monoalkenyl aromatic hydrocarbon-conjugated diene block copolymers, hydrogenated products thereof or mixtures thereof, and optionally, (d) a propylene polymer material.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: December 6, 1994
    Assignee: Himont Incorporated
    Inventors: Anthony J. DeNicola, Jr., Ralph A. Guyer
  • High-melt-flow fiber-reinforced propylene polymer compositions
    Patent number: 4997875
    Abstract: Disclosed is a composition comprising about from 20 to 65 percent by weight of a fiber reinforcing-agent, preferably glass fiber, dispersed in as-polymerized propylene polymer material, e.g., propylene homopolymer, having a melt flow rate (MFR) of about from 55 to 430 dg/min. The composition is useful in the manufacture of large and complex fiber-reinforced articles and parts by injection molding.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: March 5, 1991
    Assignee: Himont Incorporated
    Inventors: Kathleen A. Geddes, Ralph A. Guyer, Richard C. Miller