Patents by Inventor Yasuhito Maeda

Yasuhito Maeda 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).

  • Polylactic acid and manufacturing process thereof
    Patent number: 8304490
    Abstract: It is an object of the present invention to provide polylactic acid containing a stereocomplex crystal and having excellent moldability, a high molecular weight, high crystallinity and a high melting point and a process for manufacturing the same. It is another object of the present invention to provide a composition comprising the polylactic acid and a molded product of the polylactic acid. The present invention is characterized from polylactic acid having a weight average molecular weight of 80,000 to 500,000 and a melting peak at 195° C. or higher which accounts for 80% or more of the total of melting peaks in the temperature elevation step when measured by a differential scanning calorimeter (DSC) and a process for manufacturing the same.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: November 6, 2012
    Assignees: Teijin Limited, Musashino Chemical Laboratory, Ltd, Mutual Corporation
    Inventors: Yoshiharu Kimura, Zhen Tang, Kazuki Fukushima, Kiyotsuna Toyohara, Ryuji Nonokawa, Yasuhito Maeda, Masayuki Takada, Yuka Komazawa, Tsuyoshi Aoki
  • Polyactic Acid and Manufacturing Process Thereof
    Publication number: 20080039579
    Abstract: It is an object of the present invention to provide polylactic acid containing a stereocomplex crystal and having excellent moldability, a high molecular weight, high crystallinity and a high melting point and a process for manufacturing the same. It is another object of the present invention to provide a composition comprising the polylactic acid and a molded product of the polylactic acid. The present invention is characterized from polylactic acid having a weight average molecular weight of 80,000 to 500,000 and a melting peak at 195° C. or higher which accounts for 80% or more of the total of melting peaks in the temperature elevation step when measured by a differential scanning calorimeter (DSC) and a process for manufacturing the same.
    Type: Application
    Filed: July 20, 2005
    Publication date: February 14, 2008
    Applicants: Teijin Limited, Musashino Chemical Laboratory, Ltd., Mutual Corporation, Yoshiharu Kimura
    Inventors: Yoshiharu Kimura, Zhen Tang, Kazuki Fukushima, Kiyotsuna Toyohara, Ryuji Nonokawa, Yasuhito Maeda, Masayuki Takada, Yuka Komazawa, Tsuyoshi Aoki
  • Microorganism capable of degrading aromatic polyester and method of degrading aromatic polyester using the same
    Patent number: 7326556
    Abstract: A microorganism which belongs to the genus Rhizobium and has the ability of degrading an aromatic polyester, and a method of degrading an aromatic polyester by using the microorganism. According to this method, the aromatic polyester can be degraded safely and relatively swiftly at a low cost.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: February 5, 2008
    Assignee: Teijin Limited
    Inventors: Kohei Oda, Yoshiharu Kimura, Kazumi Hiraga, Yasuhito Maeda, Kiyotsuna Toyohara, Hiroyoshi Minematsu
  • Microorganism capable of degrading aromatic polyester and method of degrading aromatic polyester using the same
    Publication number: 20060228792
    Abstract: A microorganism which belongs to the genus Rhizobium and has the ability of degrading an aromatic polyester, and a method of degrading an aromatic polyester by using the microorganism. According to this method, the aromatic polyester can be degraded safely and relatively swiftly at a low cost.
    Type: Application
    Filed: August 19, 2004
    Publication date: October 12, 2006
    Inventors: Kohei Oda, Yoshiharu Kimura, Kazumi Hiraga, Yasuhito Maeda, Kiyotsuna Toyohara, Hiroyoshi Minematsu