Patents by Inventor Hisanao Nagasawa

Hisanao Nagasawa 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).

  • Proteinaceous emulsifier, process for preparing same and emulsion type cosmetic compositions containing same
    Patent number: 4826818
    Abstract: A proteinaceous emulsifier can be obtained by reacting an amino acid ester with a hydrophilic protein in the presence of an endopeptidase to form decomposition products of the hydrophilic protein having a carboxyl end group joined to the amino group of the amino acid ester by amide linkage.This proteinaceous emulsifier has a typical surfactant structure in which a hydrophobic portion consisting of the amino acid ester is attached to the rear end of a hydrophilic portion consisting of the protein, and is characterized by causing little irritation to the skin, exhibiting strong emulsifying power and possessing moisture retention properties. Thus, it is very suitable for use as an emulsifier in various cosmetics such as creams, milky lotions and the like.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: May 2, 1989
    Assignee: Kanebo Ltd.
    Inventors: Kenji Mori, Kazuyoshi Morita, Shizume Takemoto, Hisanao Nagasawa, Yasuhisa Ohtani, Masashi Matsui, Sohichi Arai