Patents by Inventor Leon A. Zweig

Leon A. Zweig 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).

  • Isopropyl alcohol-free catalytic fountain solution concentrate and method for introducing a catalytic agent into lithographic printing ink
    Patent number: 5054394
    Abstract: A fountain solution concentrate for introducing a catalytic agent into lithographic printing ink. The catalytic agent is formulated into a catalytic fountain solution, transported via the fountain solution to the ink and infused therein to impart desired qualities to the ink. An organic titanate compound is used as a catalytic agent in conjunction with apparatus to initiate drying for preventing ink offset and producing clean, sharp printing. The concentrate does not require the addition of alcohol.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: October 8, 1991
    Inventor: Leon A. Zweig
  • Method of infusing catalytic cross-linking agents into lithographic printing ink
    Patent number: 4982661
    Abstract: A method for introducing a catalytic agent to lithographic printing ink. The catalytic agent is formulated into a catalytic fountain solution, transported via the fountain solution to the ink and infused therein to impart desired qualities to the ink. An organic titanate compound is used as a catalytic agent in conjunction with apparatus to initiate drying for preventing ink offset and producing clean, sharp printing.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: January 8, 1991
    Inventor: Leon A. Zweig
  • Catalytic fountain solution
    Patent number: 4906296
    Abstract: A fountain solution for introducing a catalytic agent to lithographic printing ink. The catalytic agent is formulated into a catalytic fountain solution, transported via the fountain solution to the ink and infused therein to impart desired qualities to the ink. An organic titanate compound is used as a catalytic agent in conjunction with apparatus to initiate drying for preventing ink offset and producing clean, sharp printing.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: March 6, 1990
    Inventor: Leon A. Zweig