Patents by Inventor Gerald P. Harwood, Jr.

Gerald P. Harwood, Jr. 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).

  • Printing members having permeability-transition layers and related methods
    Patent number: 8173346
    Abstract: Affinity transitions from hydrophobic to hydrophilic states, rather than ablation mechanisms, facilitate the creation of an imagewise lithographic pattern on a printing plate. In various embodiments, a lithographic printing member comprises a topmost “imaging” layer that undergoes, in response to heat, a transition from a hydrophobic and oleophilic state to a hydrophilic state (which may or may not also be oleophilic); and a substrate disposed below the imaging layer. The affinity change in the imaging layer may be due essentially to a foaming agent therein. The foaming agent decomposes upon heating, creating a gas that foams the surface of the imaging layer. The resulting spongelike texture enables the surface to retain water, i.e., renders it hydrophilic.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: May 8, 2012
    Assignee: Presstek, Inc.
    Inventors: Gerald P. Harwood, Jr., Eugene L. Langlais
  • PRINTING MEMBERS HAVING PERMEABILITY-TRANSITION LAYERS AND RELATED METHODS
    Publication number: 20090297983
    Abstract: Affinity transitions from hydrophobic to hydrophilic states, rather than ablation mechanisms, facilitate the creation of an imagewise lithographic pattern on a printing plate.
    Type: Application
    Filed: May 15, 2009
    Publication date: December 3, 2009
    Applicant: Presstek, Inc.
    Inventors: Gerald P. Harwood, JR., Eugene L. Langlais
  • Lithographic imaging with printing members having multiphase laser-responsive layers
    Patent number: 6684785
    Abstract: The present invention provides a printing member having a single radiation-absorptive multiphase layer over a substrate layer that may be imaged with or without ablation.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: February 3, 2004
    Assignee: Presstek, Inc.
    Inventor: Gerald P. Harwood, Jr.
  • Ink jet recording sheet
    Patent number: 6068373
    Abstract: An ink jet recording sheet comprises a support carrying an ink-receiving layer, this layer comprising a hydrophilic polymer, preferably poly(vinyl alcohol) and a poly(vinylbenzyl quaternary ammonium salt) of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is independently alkyl of from 1 to 4 carbon atoms; each of R.sup.7, R.sup.8 and R.sup.9 is independently alkyl of from 1 to 18 carbon atoms and the total number of carbon atoms in R.sup.7, R.sup.8 and R.sup.9 is from 13 to 20; each M.sup.- is an anion; and each of a, b and c is the molar proportion of the respective repeating units.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: May 30, 2000
    Assignee: Polaroid Corporation
    Inventors: Yung T. Chen, Gerald P. Harwood, Jr., Michael S. Viola
  • Ink jet recording sheet
    Patent number: 6010790
    Abstract: An ink jet recording sheet comprises a support carrying an ink-receiving layer, this layer comprising a hydrophilic polymer, preferably poly(vinyl alcohol) and a poly(vinylbenzyl quaternary ammonium salt) of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is independently alkyl of from 1 to 4 carbon atoms; each of R.sup.7, R.sup.8 and R.sup.9 is independently alkyl of from 1 to 18 carbon atoms and the total number of carbon atoms in R.sup.7, R.sup.8 and R.sup.9 is from 13 to 20; each M.sup.- is an anion; and each of a, b and c is the molar proportion of the respective repeating units.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: January 4, 2000
    Assignee: Polaroid Corporation
    Inventors: Yung T. Chen, Gerald P. Harwood, Jr., Michael S. Viola
  • Ink jet recording sheet
    Patent number: 6003989
    Abstract: An ink jet recording sheet comprises a support carrying an ink-receiving layer, this layer comprising a mixture of a derivatized (preferably acetoacetylated) poly(vinyl alcohol) and a non-derivatized poly(vinyl alcohol). The ink-receiving layer preferably also comprises a poly(vinylbenzyl quaternary ammonium salt) and poly(vinylpyrrolidone).
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: December 21, 1999
    Assignee: Polaroid Corporation
    Inventors: Yung T. Chen, Gerald P. Harwood, Jr., Michael S. Viola
  • Ink jet recording sheet
    Patent number: 5942335
    Abstract: An ink jet recording sheet comprises a support carrying an ink-receiving layer, this layer comprising a hydrophilic polymer, preferably poly(vinyl alcohol) and a poly(vinylpyridine). The images formed using this sheet display good water fastness.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: August 24, 1999
    Assignee: Polaroid Corporation
    Inventors: Yung T. Chen, Gerald P. Harwood, Jr., Shawn P. Lambert, Kenneth J. McCarthy, Richard J. Murphy, Michael S. Viola, Xiaojia Z. Wang
  • Ink jet recording sheet
    Patent number: 5856023
    Abstract: An ink jet recording sheet comprises a support carrying an ink-receiving layer, this layer comprising a mixture of a derivatized (preferably acetoacetylated) poly(vinyl alcohol) and a non-derivatized poly(vinyl alcohol). The ink-receiving layer preferably also comprises a poly(vinylbenzyl quaternary ammonium salt) and poly(vinylpyrrolidone).
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: January 5, 1999
    Assignee: Polaroid Corporation
    Inventors: Yung T. Chen, Gerald P. Harwood, Jr., Michael S. Viola