Patents by Inventor Keiko Sakai

Keiko Sakai 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).

  • Pyridazine derivatives, manufacturing method and related composition
    Publication number: 20010012841
    Abstract: Ultraviolet absorbents and photostabilizers have an excellent absorption ability in a wide range of ultraviolet rays, and also have high stability and high safety.
    Type: Application
    Filed: December 15, 2000
    Publication date: August 9, 2001
    Inventors: Masaru Suetsugu, Eijiro Hara, Yuji Matsushita, Haruhiko Inoue, Haruo Ogawa, Keiko Sakai, Shigeru Mugikura