Patents by Inventor Kenji Motokawa

Kenji Motokawa 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).

  • Test method on feline vaccinated with feline immunodeficiency virus vaccine, and antigen for use in the test
    Patent number: 8394581
    Abstract: Since FIV-vaccinated cats produce antibodies against FIV, distinguishing them from FIV-infected cats is difficult by serological diagnostic methods using FIV and FIV-derived substances. The present invention enables tests for determining the presence or absence of a FIV vaccination history in a cat by detecting antibodies that are produced as a result of vaccination of a cat with an FIV vaccine, but not as a result of FIV infection. Using the methods of the present invention, whether an anti-FIV antibody-positive cat is infected with FIV or has been vaccinated can be conveniently distinguished.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: March 12, 2013
    Assignee: The Kitasato Institute
    Inventors: Tsutomu Hohdatsu, Kenji Motokawa, Hajime Kusuhara
  • FELINE INFECTIOUS PERITONITIS VACCINE
    Publication number: 20120107390
    Abstract: FIP vaccines were provided that use an N protein with a specific structure, or a fragment thereof, as an antigen. Preferred antigens of this invention are N proteins derived from a specific type I virus strain (KU-2). Vaccines comprising such an N protein confer preventive effects against a wide range of FIPVs. In addition, the N proteins are very safe because they do not comprise epitopes that enhance infection. Furthermore, preventive effects can be accomplished against type I viruses, which actually cause 70% or more of FIP.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: Kitatsato Daiichi Sankyo Vaccine Co., Ltd.
    Inventors: Kenji Motokawa, Hajime Kusuhara, Hiroyuki Koyama, Tsutomu Hohdatsu, Setsuo Arai
  • Test Method on Feline Vaccinated with Feline Immunodeficiency Virus Vaccine, and Antigen for Use in the Test
    Publication number: 20100267047
    Abstract: Since FIV-vaccinated cats produce antibodies against FIV, distinguishing them from FIV-infected cats is difficult by serological diagnostic methods using FIV and FIV-derived substances. The present invention enables tests for determining the presence or absence of a FIV vaccination history in a cat by detecting antibodies that are produced as a result of vaccination of a cat with an FIV vaccine, but not as a result of FIV infection. Using the methods of the present invention, whether an anti-FIV antibody-positive cat is infected with FIV or has been vaccinated can be conveniently distinguished.
    Type: Application
    Filed: July 25, 2008
    Publication date: October 21, 2010
    Applicant: THE KITASATO INSTITUTE
    Inventors: Tsutomu Hohdatsu, Kenji Motokawa, Hajime Kusuhara
  • Vaccine for feline infectious peritonitis
    Publication number: 20060083755
    Abstract: FIP vaccines were provided that use an N protein with a specific structure, or a fragment thereof, as an antigen. Preferred antigens of this invention are N proteins derived from a specific type I virus strain (KU-2). Vaccines comprising such an N protein confer preventive effects against a wide range of FIPVs. In addition, the N proteins are very safe because they do not comprise epitopes that enhance infection. Furthermore, preventive effects can be accomplished against type I viruses, which actually cause 70% or more of FIP.
    Type: Application
    Filed: July 4, 2003
    Publication date: April 20, 2006
    Applicant: The Kitasato Institute
    Inventors: Kenji Motokawa, Hajime Kusuhara, Hiroyuki Koyama, Tsutomu Hohdatsu, Setsuo Arai