Patents by Inventor Walter L. Garrett

Walter L. Garrett 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).

  • Image-bearing lithographic plates with desensitizing coating
    Patent number: 4266481
    Abstract: Aqueous solutions are provided for treating image-bearing lithographic plates.
    Type: Grant
    Filed: June 29, 1979
    Date of Patent: May 12, 1981
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Garrett, Ralph G. Czerepinski
  • Method for treating imaged lithographic printing plates
    Patent number: 4246843
    Abstract: A method for treating imaged lithographic printing plates with a solution comprising (1) water, (2) an active polymer component for rendering non-image areas of a lithographic printing plate hydrophilic, comprised of a polyacrylamide-based polymer or copolymer or a blend of polyacrylamide and polyacrylic acid, or the like, said polymer or copolymer or blend having an average molecular weight of from about 5,000 to about 10.sup.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: January 27, 1981
    Assignee: The Dow Chemical Company
    Inventor: Walter L. Garrett
  • Method of treating image-bearing lithographic plates
    Patent number: 4214531
    Abstract: Aqueous solutions are provided for treating image-bearing lithographic plates.
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: July 29, 1980
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Garrett, Czerepinski, Ralph G.
  • Method of treating image-bearing lithographic plates
    Patent number: 4200688
    Abstract: Aqueous solutions are provided for treating image-bearing lithographic plates.
    Type: Grant
    Filed: March 22, 1978
    Date of Patent: April 29, 1980
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Garrett, Ralph G. Czerepinski
  • Method of desensitizing image-bearing lithographic plates
    Patent number: 4186250
    Abstract: Aqueous solutions are provided for treating imagebearing lithographic plates.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: January 29, 1980
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Garrett, Ralph G. Czerepinski
  • Composition suitable for use as desensitizing gumming solution for lithographic printing plates
    Patent number: 4143021
    Abstract: An aqueous solution is provided which is suitable for use as a desensitizing gum for treating imaged lithographic printing plates, comprising (1) water, (2) an active polymer component for rendering non-image areas of a lithographic printing plate hydrophilic, comprised of a polyacrylamide-based polymer or copolymer or a blend of polyacrylamide and polyacrylic acid, or the like, said polymer or copolymer or blend having an average molecular weight of from about 5,000 to about 10.sup.
    Type: Grant
    Filed: July 23, 1976
    Date of Patent: March 6, 1979
    Assignee: The Dow Chemical Company
    Inventor: Walter L. Garrett
  • Fountain compositions for use in lithographic printing comprising aqueous solutions of polyacrylamide based polymers and blends of polyacrylamide and polyacrylic acid with an organic chelating agent
    Patent number: 4116896
    Abstract: Precipitation at relatively high pH levels, e.g. above about 4 or more, in an acidic water/alcohol type fountain composition containing polyvalent metal cations and, as an active polymer component for rendering the non-image areas of a lithographic plate hydrophilic, a polyacrylamide-based polymer having a weight average molecular weight (M.sub.w) of from about 5,000 to about 1,000,000 and having from about 3 to about 70 percent of the carbonyl sites as carboxyl groups, or a blend of polyacrylamide and polyacrylic acid, or the like, is controlled by providing in the fountain composition an effective amount of an organic chelating agent for polyvalent metal cations which is substantially inert with respect to the active polymer component. The suitable chelating agents are further characterized in that at 25.degree. C, each (A) has a 1:1 stability constant with zinc of at least about 10.sup.7.5 ; (B) has a solubility of at least about 0.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: September 26, 1978
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Garrett, Ralph E. Friedrich, Ralph G. Czerepinski
  • Preparation of a cured resole resin
    Patent number: 4067829
    Abstract: Cured phenolic resole bodies including foams which are generally non-corrosive are prepared by including in the curable mixture an inorganic alkali-containing particulate solid such as certain glasses.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: January 10, 1978
    Assignee: The Dow Chemical Company
    Inventor: Walter L. Garrett