Patents by Inventor John Alan Lawton

John Alan Lawton 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).

  • Solid imaging compositions for preparing polyethylene-like articles
    Patent number: 6727043
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polyethylene articles.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: April 27, 2004
    Assignee: DSM Desotech, Inc.
    Inventor: John Alan Lawton
  • Solid imaging compositions for preparing polyethylene-like articles
    Publication number: 20040023158
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polyethylene articles.
    Type: Application
    Filed: November 22, 2002
    Publication date: February 5, 2004
    Inventor: John Alan Lawton
  • Solid imaging compositions for preparing polyethylene-like articles
    Patent number: 6537729
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polyethylene articles.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: March 25, 2003
    Assignee: DSM Desotech, Inc.
    Inventor: John Alan Lawton
  • Solid imaging compositions for preparing polyethylene-like articles
    Patent number: 6287748
    Abstract: This invention discloses compositions adapted to produce, through solid imaging means, excellent quality objects having material properties that simulate the look and feel of polyethylene articles.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: September 11, 2001
    Assignee: DSM N.V.
    Inventor: John Alan Lawton
  • Photohardenable epoxy composition
    Patent number: 5707780
    Abstract: A photohardenable composition especially suitable for use in solid imaging. The compositions are characterized by their improved photospeed in combined with excellent initial green strength. The compositions allows for the production of articles by solid imaging processing techniques that show little or no distortion, high accuracy, excellent clarity. The compositions are low in toxicity and have low sensitivity to water.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: January 13, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Alan Lawton, William John Nebe, Glen Anthony Thommes, Jonathan V. Caspar
  • Method of solid imaging a photohardenable composition utilizing argon laser at 351 nm and 364 nm
    Patent number: 5667937
    Abstract: A combination of a photoacid precursor and sensitizer for use with multiple wavelengths of an argon ion laser.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: September 16, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Alan Lawton, Jonathan V. Caspar
  • Stabilizers for use with photoacid precursor formulations
    Patent number: 5665792
    Abstract: The present invention discloses stabilizers for formulations containing photoacid precursors and cationically polymerizable materials. The stabilizers have a limited solubility in the formulations and are in solubility equilibrium in the formulation. The stabilizers being present as a solid phase in the formulation in excess of their solubility limit, the concentration of the stabilizers is continuously replenished as the stabilizer reacts with undesired free acid.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 9, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Alan Lawton, William John Nebe, Glen Anthony Thommes