Patents by Inventor Shiro Ohno

Shiro Ohno 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 recovering fluorine-containing emulsifier
    Patent number: 7351342
    Abstract: An aqueous solution containing a fluorine-containing emulsifier in a low concentration of at least 1 ppm by mass and at most 1% by mass (e.g., coagulation waste water after an emulsion polymerization of a fluoropolymer and/or an aqueous solution obtained by washing with an aqueous solution a waste gas from a drying process and/or a heat treating process of the fluoropolymer) is subjected to vacuum concentration under a pressure of at most 100 kPa and a temperature of the aqueous solution of at most 100° C. by means of a heating tube surface evaporation type concentrator equipped with a heat pump or the like, and the fluorine-containing emulsifier is recovered from a highly concentrated aqueous solution containing the fluorine-containing emulsifier in a higher concentration of at least 5% by mass. According to the present method, the fluorine-containing emulsifier can be recovered with a high yield from a low-concentration liquid such as coagulation waste water of a fluoropolymer.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: April 1, 2008
    Assignees: Asahi Glass Company, Limited, Sasakura Engineering Co., Ltd.
    Inventors: Hiroshi Funaki, Koichi Yanase, Hiroki Kamiya, Masao Uehara, Kenichiro Nagatomo, Yasushi Nishimura, Shiro Ohno, Satoru Hirano
  • Method for recovering fluorine-containing emulsifier
    Publication number: 20050150833
    Abstract: An aqueous solution containing a fluorine-containing emulsifier in a low concentration of at least 1 ppm by mass and at most 1% by mass (e.g., coagulation waste water after an emulsion polymerization of a fluoropolymer and/or an aqueous solution obtained by washing with an aqueous solution a waste gas from a drying process and/or a heat treating process of the fluoropolymer) is subjected to vacuum concentration under a pressure of at most 100 kPa and a temperature of the aqueous solution of at most 100° C. by means of a heating tube surface evaporation type concentrator equipped with a heat pump or the like, and the fluorine-containing emulsifier is recovered from a highly concentrated aqueous solution containing the fluorine-containing emulsifier in a higher concentration of at least 5% by mass. According to the present method, the fluorine-containing emulsifier can be recovered with a high yield from a low-concentration liquid such as coagulation waste water of a fluoropolymer.
    Type: Application
    Filed: December 16, 2004
    Publication date: July 14, 2005
    Applicants: ASAHI GLASS COMPANY LIMITED, SASAKURA ENGINEERING CO., LTD.
    Inventors: Hiroshi Funaki, Koichi Yanase, Hiroki Kamiya, Masao Uehara, Kenichiro Nagatomo, Yasushi Nishimura, Shiro Ohno, Satoru Hirano
  • Centrifugal separator for separating sludge in waste water
    Patent number: 4724076
    Abstract: This disclosure relates to a centrifugal separator for separating suspended substances from a liquid such as the waste water of a ship.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: February 9, 1988
    Assignee: Sasakura Engineering Co., Ltd.
    Inventors: Nobuyuki Deguchi, Norio Shintani, Mikio Morita, Shiro Ohno