Patents by Inventor Simon L. Chu

Simon L. Chu 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).

  • Aluminum substrates useful for lithographic printing plates
    Patent number: 4477317
    Abstract: A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises first mechanically graining at least one surface of an aluminum sheet to obtain a pumice grained surface of the aluminum sheet, and then electrolytically etching said grained surface with alternating current.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: October 16, 1984
    Assignee: Polychrome Corporation
    Inventors: Simon L. Chu, Eugene Golda, Jen-Chi Huang, Alan Wilkes
  • Electrochemically treated photo-lithographic plates
    Patent number: 4152158
    Abstract: There are disclosed herein lithographic plates having an aluminum base the surface of which has been made porous and hardened first by an alternating current anodization in a hydrochloric acid electrolyte and then by a direct current anodization in a sulfuric acid electrolyte.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: May 1, 1979
    Assignee: Polychrome Corporation
    Inventor: Simon L. Chu
  • Method for producing lithographic printing plates
    Patent number: 4148649
    Abstract: A method for producing an improved aluminum substrate for lithographic printing plates which comprises applying an interlayer bonding solution to the surface of an aluminum web, heating said interlayer solution on the surface of the said aluminum at an elevated temperature and removing any excess solution which has not reacted with the aluminum substrate.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: April 10, 1979
    Assignee: Polychrome Corporation
    Inventors: Eugene Golda, Alan L. Wilkes, Simon L. Chu
  • Photosensitive diazo condensate compositions
    Patent number: 4093465
    Abstract: Compositions comprising (I) solvent-soluble, negative-acting, light-sensitive reaction products of (a) water-soluble diazo condensation products with (b) water-insolubilizing inorganic compounds therefor and (II) synthetic, film-forming oleophilic resins, which compositions can be coated onto suitable base sheet materials to form presensitized lithographic printing plates, proofs for multi-color printing, visual aids, printed circuits and the like.
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: June 6, 1978
    Assignee: Polychrome Corporation
    Inventors: Simon L. Chu, Eugene Golda
  • Process for electrolytic graining of aluminum sheet
    Patent number: 4072589
    Abstract: A method for electrolytically graining the surface of aluminum sheets useful in the production of lithographic printing plates which comprises subjecting said aluminum sheets to the action of alternating electric current in an aqueous electrolytic solution containing, in combination, small but effective amounts of both hydrochloric and nitric acids.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: February 7, 1978
    Assignee: Polychrome Corporation
    Inventors: Eugene Golda, Jen-chi Huang, Ken-ichi Shimazu, Simon L. Chu
  • Apparatus for meniscus coating of a moving web
    Patent number: 4055144
    Abstract: A moving essentially non-porous web is positioned above and in close proximity to the upper surface of a narrow, very shallow pool of coating solution. A coating meniscus extends directly from the upper surface to the web to transfer coating solution from the pool to the web. Stagnation of solution in the pool is eliminated by feeding solution to the pool at the center and bottom thereof, and removing excess solution through ports at the top surface of the pool at each end thereof.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: October 25, 1977
    Assignee: Polychrome Corporation
    Inventors: Simon L. Chu, Robert Sharowsky, Peter Shu
  • Method of producing lithographic printing plates
    Patent number: 4049504
    Abstract: In the production of lithographic printing plates, the method of anodizing the surface of an aluminum web substrate which comprises subjecting said web to an anodization treatment in an electrolyte comprised of a combination of sulfuric acid and phosphoric acid, and thereafter applying a lithographically acceptable photosensitive coating to the web to obtain a presensitized lithographic printing plate.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: September 20, 1977
    Assignee: Polychrome Corporation
    Inventors: Simon L. Chu, Eugene Golda