Patents by Inventor Sizukuni Yata

Sizukuni Yata 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).

  • Process for producing modified phenolic novolak fibers
    Patent number: 4115364
    Abstract: A process for producing phenolic novolak filaments having improved heat resistance which comprises melt-spinning a fiber-forming phenolic resin and curing the resulting filaments, wherein at least one compound containing at least one group selected from the group consisting of active hydrogen-containing amino, amide, thioamide, ureylene and thioureylene groups and derivatives of these groups is applied to said phenolic resin before, during or after the curing treatment.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: September 19, 1978
    Assignee: Nippon Kynol Incorporated
    Inventors: Isao Kimura, Sizukuni Yata