Patents by Inventor Yasuo Kamada

Yasuo Kamada 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).

  • Publication number: 20150361213
    Abstract: Provided is a polymer product, in which the weight average molecular weight measured by gel permeation chromatography is 250,000 or greater and the content of residual ring-opening-polymerizable monomer is 100 ppm by mass or greater but less than 1,000 ppm by mass, or a polymer product, in which the content of residual ring-opening-polymerizable monomer is from 1,000 ppm by mass to 20,000 ppm by mass and the yellow index (YI) value is 15 or less.
    Type: Application
    Filed: January 20, 2014
    Publication date: December 17, 2015
    Inventors: Yasuo KAMADA, Taichi NEMOTO, Satoshi IZUMI, Yoko ARAI, Chiaki TANAKA, Yukihiro IMANAGA
  • Publication number: 20150353677
    Abstract: To provide a polymer production apparatus, which contains: a first supply unit configured to supply raw materials including a monomer; a second supply unit configured to supply a compressive fluid; a contact unit configured to bring the monomer into contact with the compressive fluid; and a reaction unit configured to allow the monomer, which has been brought into contact with the compressive fluid, to react in the presence of the compressive fluid, wherein the reaction unit contains one, or two or more extrusion devices, and one, or two or more stirring devices.
    Type: Application
    Filed: January 27, 2014
    Publication date: December 10, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Satoshi IZUMI, Taichi NEMOTO, Yoko ARAI, Yasuo KAMADA, Chiaki TANAKA
  • Publication number: 20150322201
    Abstract: Provided is a polymer product that has a melting point difference (Tm1?Tm0) of 3° C. or more between a polymer melting point Tm0 before it is heated and a polymer melting point Tm1 after it is heated under a nitrogen atmosphere for 60 minutes at a temperature that is higher than the highest polymer melting point by from 10° C. to 50° C.
    Type: Application
    Filed: January 27, 2014
    Publication date: November 12, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoko ARAI, Taichi NEMOTO, Yasuo KAMADA, Satoshi IZUMI, Chiaki TANAKA, Yukihiro IMANAGA, Tatsuya MORITA
  • Publication number: 20150141611
    Abstract: A polymer production apparatus, including: supplying unit containing first supplying unit to supply raw materials containing monomer, and second supplying unit to supply compressive fluid; contacting unit to bring the monomer and the compressive fluid into contact together; and outlet configured to discharge reaction product of the monomer, wherein reaction unit is provided between the contacting unit and the outlet, where the reaction unit is to pass the monomer from the contacting unit side to the outlet side, while allowing the monomer to carry out a polymerization reaction in the presence of the compressive fluid, and wherein the reaction unit contains circulation unit containing first pipe and second pipe, where a fluid is passed through the first pipe from the contacting unit side to the outlet side, and the second pipe is to return the fluid from return port provided upstream extrusion unit to inlet provided upstream the return port.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Inventors: Yuuichi SATOH, Satoshi IZUMI, Taichi NEMOTO, Yoko ARAI, Yasuo KAMADA, Chiaki TANAKA
  • Publication number: 20140213754
    Abstract: To provide a method for producing a polymer, which contains: bringing an intermediate polymer, which has been obtained through ring-opening polymerization of a ring-opening polymerizable monomer, into contact with, and melting the intermediate polymer in a compressive fluid having a density of 230 kg/m3 or greater, at temperature lower than a melting point of the intermediate polymer, at a ratio of 0.05 to 10, to dissolve a low-molecular-weight compound contained in the intermediate polymer in the compressive fluid, to thereby extract the low-molecular-weight compound, wherein the ratio is a ratio of a mass of the intermediate polymer to a mass of the compressive fluid.
    Type: Application
    Filed: January 22, 2014
    Publication date: July 31, 2014
    Inventors: Taichi NEMOTO, Chiaki Tanaka, Satoshi Izumi, Yoko Arai, Yasuo Kamada, Tatsuya Morita