Patents by Inventor Stephen Postle

Stephen Postle 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).

  • Polyester compositions and use thereof in extrusion coating
    Patent number: 6153264
    Abstract: Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of 10,000 to 50,000 and optionally, (b) a modifying resin, selected from epoxy resins having an epoxy equivalent weight of 500 to 15,000, acrylic resins or polyolefin resins. The extrusion coating composition is applied to a metal substrate in an extrusion process to provide a composition film having a thickness of about 1 to about 40 microns.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: November 28, 2000
    Assignee: The Dexter Corporation
    Inventors: Christina Schmid, Rolf Jung, Hans Widmer, Martin Lu, Artemia Jimenez, Louis Sharp, Stephen Postle
  • Solid coating compositions for powder and extrusion applications
    Patent number: 5994462
    Abstract: A solid coating composition for use in powder coating and extrusion coating applications is disclosed. The coating composition contains about 70 to about 95% of a base resin, such as a polyester, and about 1 to about 50% of a low-to-medium molecular weight end-capped epoxy resin, and is essentially free of a bisphenol-A diglycidyl ether monomer. The solid coating composition is applied to a metal substrate in a powder coating or an extrusion process to provide a metal article having a composition film having a thickness of about 1 to about 200 microns. The metal articles can be used to package food and beverages.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: November 30, 1999
    Assignee: The Dexter Corporation
    Inventors: K. G. Srinivasan, Stephen Postle, Hans Widmer
  • Extrusion coating compositions and method
    Patent number: 5942285
    Abstract: Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of about 10,000 to about 35,000, and (b) a modifying resin, such as an epoxy resin having an epoxy equivalent weight of about 500 to about 15,000. The extrusion coating composition is applied to a metal substrate in an extrusion process to provide a composition film having a thickness of about 1 to about 40 microns.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: August 24, 1999
    Assignee: The Dexter Corporation
    Inventors: Christian Schmid, Rolf Jung, Hans Widmer, Martin Lu, Artemio Jimenez, Louis Sharp, Stephen Postle