Patents by Inventor Katsushi Momose

Katsushi Momose 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).

  • Polyglycolic acid resin particle composition and process for production thereof
    Patent number: 8304500
    Abstract: A particulate polyglycolic acid resin composition, comprising: a blend of a first particulate polyglycolic acid resin and a second particulate polyglycolic acid resin each having a moisture content of at most 110 ppm and providing a ratio of melt-viscosity (as measured at 270° C. and a shear rate of 121 sec?1; the same as hereinafter) therebetween of above 1 and at most 10. After the polymerization, the first and second particulate polyglycolic acid resins can cause change in properties before the forming (e.g., during storage); or during the forming process. However, by adequately determining the blending ratio between the resins while taking the melt-viscosities thereof into account, it becomes possible to provide a particulate polyglycolic acid resin composition showing a stable melt-formability and suitable as a starting material for various forming processes.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: November 6, 2012
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Fuminori Kobayashi, Fumio Akutsu, Katsushi Momose
  • Process for producing polyglycolic acid resin composition
    Patent number: 7728100
    Abstract: A particulate polyglycolic acid resin composition suitable as a material for various forming processes in produced through a process characterized by comprising: cooling a polyglycolic acid resin composition having a residual glycolide content of at most 0.6 wt. % in a molten state by contact with an aqueous cooling medium to solidify the composition, and pelletizing the composition.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: June 1, 2010
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Fuminori Kobayashi, Fumio Akutsu, Katsushi Momose
  • Polyglycolic Acid Resin Particle Composition and Process for Production Thereof
    Publication number: 20090131602
    Abstract: A particulate polyglycolic acid resin composition, comprising: a blend of a first particulate polyglycolic acid resin and a second particulate polyglycolic acid resin each having a moisture content of at most 110 ppm and providing a ratio of melt-viscosity (as measured at 270° C. and a shear rate of 121 sec?1; the same as hereinafter) therebetween of above 1 and at most 10. After the polymerization, the first and second particulate polyglycolic acid resins can cause change in properties before the forming (e.g., during storage); or during the forming process. However, by adequately determining the blending ratio between the resins while taking the melt-viscosities thereof into account, it becomes possible to provide a particulate polyglycolic acid resin composition showing a stable melt-formability and suitable as a starting material for various forming processes.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 21, 2009
    Applicant: KUREHA CORPORATION
    Inventors: Hiroyuki Sato, Fuminori Kobayashi, Fumio Akutsu, Katsushi Momose
  • Process for Producing Polyglycolic Acid Resin Composition
    Publication number: 20090118462
    Abstract: A particulate polyglycolic acid resin composition suitable as a material for various forming processes in produced through a process characterized by comprising: cooling a polyglycolic acid resin composition having a residual glycolide content of at most 0.6 wt. % in a molten state by contact with an aqueous cooling medium to solidify the composition, and pelletizing the composition.
    Type: Application
    Filed: September 20, 2006
    Publication date: May 7, 2009
    Inventors: Hiroyuki Sato, Fuminori Kobayashi, Fumio Akutsu, Katsushi Momose