Patents by Inventor Jen-Chi Huang

Jen-Chi Huang 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 grained with a saturated solution of aluminum salts of mineral acids
    Patent number: 4201836
    Abstract: A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises graining the surface of an aluminum sheet in a saturated solution of an aluminum salt of a mineral acid to which up to 10% of a mineral acid has been added, with optional electrolysis.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: May 6, 1980
    Assignee: Polychrome Corporation
    Inventor: Jen-Chi Huang
  • 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
  • Process for electrolytic graining of aluminum sheet
    Patent number: 4052275
    Abstract: A method for electrolytically graining the surface of aluminum sheets useful in the production in lithographic printing plates which comprises subjecting said aluminum sheets to the action of an electric current in an aqueous electrolytic solution containing, in combination, small but effective amounts of both hydrochloric and tartaric acids.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: October 4, 1977
    Assignee: Polychrome Corporation
    Inventors: Robert Gumbinner, Jen-Chi Huang