Patents by Inventor Philip S. Andrews

Philip S. Andrews 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).

  • Polyesteramide and sufficient carbodiimide to impart improved compression set
    Patent number: 4772649
    Abstract: Disclosed are novel blends comprising segmented polyesteramides with minor amounts of carbodiimide containing materials.The blends are characterized by excellent physical properties and improved compression set characteristics over the polyesteramides in the absence of the carbodiimide component. This allows the polymers obtained to find utility in the making of seals or gaskets which heretofore the base polyesteramides could not satisfy.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 20, 1988
    Assignee: The Dow Chemical Company
    Inventors: Philip S. Andrews, Augustin T. Chen, Kemal Onder, Laura B. Weaver
  • Flame retarded polyamide compositions
    Patent number: 4722809
    Abstract: Flame-retardant blends are provided comprising a particular type of aromatic-aliphatic copolyamide and a flame-retardant amount of an oligomeric or polymeric halogenated aromatic polycarbonate.The blends are characterized by being transparent and meeting the V-O rating when tested in accordance with the Underwriters Laboratories UL-94 vertical burn test.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: February 2, 1988
    Assignee: The Dow Chemical Company
    Inventors: Philip S. Andrews, Karl W. Rausch, Jr., Kemal Onder
  • Polyamide/polyetherimide alloys
    Patent number: 4612353
    Abstract: Blends are provided comprising (a) from about 25 to about 75 percent by weight of a particular aromatic-aliphatic polyamide and (b) complementally 75 to 25 percent by weight of a particular polyetherimide.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: September 16, 1986
    Assignee: The Dow Chemical Company
    Inventors: Philip S. Andrews, Kemal Onder
  • Copolyamide from arylene diamine and mixture of alkylene dicarboxylic acids
    Patent number: 4065441
    Abstract: Novel copolyamides having the recurring unit ##STR1## are disclosed wherein x, in 50 percent to 85 percent of the recurring units, is an integer from 6 to 10 inclusive, and, in 15 percent to 50 percent of the recurring units is 4, and Ar is an arylene radical. The copolyamides are characterized by ease of melt processing such as in molding, extruding, and injection molding, while at the same time possessing good physical properties, and being further characterized by their ease of conversion from the amorphous to the crystalline state which, in turn, gives rise to a high degree of versatility in their fabrication.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: December 27, 1977
    Assignee: The Upjohn Company
    Inventors: Philip S. Andrews, William J. Farrissey, Jr., Besir K. Onder, James N. Tilley