Patents by Inventor Yuji Takenouchi

Yuji Takenouchi 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).

  • Polyvinyl alcohol powder
    Patent number: 5811488
    Abstract: The present invention provides a polyvinyl alcohol powder which comprises a pore having an average diameter of 0.1 to 10 .mu.m in the range of 0.05 to 0.4 cc/g.Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially.Since the PVA powder of the present invention has a low content of an organic volatile component and a low content of a nonvolatile component such as a carboxylic acid salt or the like which is derived from a basic catalyst, it has an excellent industrial handleability.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: September 22, 1998
    Assignee: Kuraray Co., Ltd.
    Inventors: Naoto Narumoto, Takanori Kitamura, Yuji Takenouchi, Takanori Tsugiya, Hisamichi Yanai