Patents by Inventor Dana E. Laing

Dana E. Laing 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).

  • Injection molding of polymeric material
    Patent number: 8137600
    Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: March 20, 2012
    Assignee: Trexel, Inc.
    Inventors: David E. Pierick, Jere R. Anderson, Sung Woon Cha, Liqin Chen, James F. Stevenson, Dana E. Laing
  • Injection molding of polymeric material
    Patent number: 7361294
    Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: April 22, 2008
    Assignee: Trexel, Inc.
    Inventors: David E. Pierick, Jere R. Anderson, Sung Woon Cha, Liqin Chen, James F. Stevenson, Dana E. Laing
  • Injection molding of polymeric material
    Patent number: 6884823
    Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: April 26, 2005
    Assignee: Trexel, Inc.
    Inventors: David E. Pierick, Jere R. Anderson, Sung W. Cha, Liqin Chen, James F. Stevenson, Dana E. Laing