Patents by Inventor Munetoshi Tomita

Munetoshi Tomita 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 producing paper, and pitch removal agent
    Patent number: 10370794
    Abstract: Provided is a method for producing paper and a pitch removal agent that can remove pitch efficiently. A pitch removal agent having an average polymerization degree of 300 to 2500, a saponification index of 70 to 88 mol % and satisfying, when the absorbance at a wavelength of 490 nm is designated as y (Abs) and the saponification index as x (mol %), the Numerical Formula (A) below is added to a pulp slurry during production of paper using waste paper in the step of deinking the waste paper by floatation and/or a step earlier: y=?0.0297x+b??(A) (wherein, 70?x?88 and 2.80?b?3.03).
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: August 6, 2019
    Assignees: KURITA WATER INDUSTRIES LTD., MITSUBISHI CHEMICAL CORPORATION
    Inventors: Chigusa Taguchi, Munetoshi Tomita, Hiroki Takeda
  • METHOD FOR PRODUCING PAPER, AND PITCH REMOVAL AGENT
    Publication number: 20170073891
    Abstract: Provided is a method for producing paper and a pitch removal agent that can remove pitch efficiently. A pitch removal agent having an average polymerization degree of 300 to 2500, a saponification index of 70 to 88 mol % and satisfying, when the absorbance at a wavelength of 490 nm is designated as y (Abs) and the saponification index as x (mol %), the Numerical Formula (A) below is added to a pulp slurry during production of paper using waste paper in the step of deinking the waste paper by floatation and/or a step earlier: y=?0.0297x+b??(A) (wherein, 70?x?88 and 2.80?b?3.03).
    Type: Application
    Filed: March 11, 2015
    Publication date: March 16, 2017
    Inventors: Chigusa TAGUCHI, Munetoshi TOMITA, Hiroki TAKEDA
  • Oxyalkylene group-containing polyvinyl alcohol resin composition and process for the production of shaped articles from said composition
    Patent number: 5478884
    Abstract: The invention provides an oxyalkylene group-containing PVA resin composition with an alkali metal acetate content of 0.001.about.1 weight % and an oxyalkylene group-containing PVA resin composition with an alkali metal acetate content of 0.001.about.1 weight %, which further contains 0.1.about.10 moles of an acid with a pKa value of not more than 5.0 per mole of the alkali metal acetate, optionally together with 0.01.about.5 weight of a phenol compound which melts at 50.degree..about.250.degree. C., a thioether or a phosphite based on the polyvinyl alcohol and/or 0.01.about.3 weight % of a fatty acid compound based on the polyvinyl alcohol.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: December 26, 1995
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Munetoshi Tomita, Shinji Noma, Tamae Suzuki
  • Melt-molded articles and laminates derived therefrom, and their use
    Patent number: 5158810
    Abstract: A melt-molded article such as water soluble fibers, a laminate and a container for waste matter, the article having biodegradability. The melt molded article is produced by melt-molding a composition comprising an oxyalkylene group-containing vinyl alcohol copolymer and starch or a starch-derived macromolecular substance.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: October 27, 1992
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tsukasa Oishi, Masaru Saeki, Munetoshi Tomita