Patents by Inventor Motoji Yokoyama

Motoji Yokoyama 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 phenolic novolak
    Patent number: 7683155
    Abstract: A phenolic novolak having the contents of a monomeric phenol and a dimeric phenol and a degree of dispersion controlled can be obtained in high yield by a process for production of a phenolic novolak having a step of conducting a heterogeneous reaction of a phenol and an aldehyde in the presence of a phosphoric acid and an unreactive oxygen-containing organic solvent as a reaction cosolvent.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: March 23, 2010
    Assignee: Asahi Organic Chemicals Industry Col., Ltd.
    Inventors: Shigeki Inatomi, Noboru Tanoue, Motoji Yokoyama, Hirofumi Shinohara, Satoshi Takehara
  • Process for producing phenolic novolak
    Publication number: 20060241276
    Abstract: A phenolic novolak having the contents of a monomeric phenol and a dimeric phenol and a degree of dispersion controlled can be obtained in high yield by a process for production of a phenolic novolak having a step of conducting a heterogeneous reaction of a phenol and an aldehyde in the presence of a phosphoric acid and an unreactive oxygen-containing organic solvent as a reaction cosolvent.
    Type: Application
    Filed: August 29, 2003
    Publication date: October 26, 2006
    Applicant: ASAHI ORGANIC CHEMICALS INDUSTRY CO., LTD.
    Inventors: Shigeki Inatomi, Noboru Tanoue, Motoji Yokoyama, Hirofumi Shinohara, Satoshi Takehara