Patents by Inventor Hendrik Jonker

Hendrik Jonker 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).

  • Physical development process utilizing a physical developer containing a specific reducing agent, a thiol compound
    Patent number: 3960564
    Abstract: A solution for the selective electroless deposition of silver comprising as essential constituents silver salt, ammonium hydroxide and a reducer chosen from tartrate, formaldehyde or hydrazine and an organic compound having one or more cyclic or polar aliphatic groups on the one hand and an SH-group on the other hand.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: June 1, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Arian Molenaar, Hendrik Jonker