Patents by Inventor Kunizo Hujii

Kunizo Hujii 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).

  • Method for etching polyamide shaped articles
    Patent number: 4298424
    Abstract: Disclosed is a method for etching a polyamide shaped article which comprises etching a polyamide shaped article formed from a composition comprising 100 parts by weight of a polyamide and 10 to 50 parts by weight of an inorganic filler with an aqueous solution of borofluoric acid.According to this treating method, a good surface capable of providing a plated article having a high adhesion and a reduced deviation of the adhesion can be formed on the polyamide shaped article.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: November 3, 1981
    Assignee: VBE Industries, Ltd.
    Inventors: Sachio Terada, Akito Suhara, Toshiro Shimada, Takashi Nakamura, Kunizo Hujii, Nobuichi Nakahira