Patents by Inventor Hijiri Hasegawa

Hijiri Hasegawa 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).

  • Precursor sol of aluminum oxide and method for manufacturing the same, method for manufacturing optical member, optical member, and optical system
    Patent number: 9354359
    Abstract: A precursor sol of aluminum oxide includes particles containing a hydrolysate and/or a condensate of an aluminum compound, a solvent, and an organo aluminum compound. When a pulsed-NMR T2 relaxation curve of nuclide 1H of the precursor sol of aluminum oxide includes two components with different T2 relaxation times and the component with the longer T2 relaxation time has an abundance level of CL (%) and the component with the shorter T2 relaxation time has an abundance level of CS (%), the relative proportion RCS (%) defined by [{CS/(CS+CL)}×100] is in the range of 23.5% to 50.0%, both inclusive.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 31, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Makino, Tomonari Nakayama, Keiko Abe, Katsuaki Kuge, Hijiri Hasegawa
  • PRECURSOR SOL OF ALUMINUM OXIDE AND METHOD FOR MANUFACTURING THE SAME, METHOD FOR MANUFACTURING OPTICAL MEMBER, OPTICAL MEMBER, AND OPTICAL SYSTEM
    Publication number: 20130258480
    Abstract: A precursor sol of aluminum oxide includes particles containing a hydrolysate and/or a condensate of an aluminum compound, a solvent, and an organo aluminum compound. When a pulsed-NMR T2 relaxation curve of nuclide 1H of the precursor sol of aluminum oxide includes two components with different T2 relaxation times and the component with the longer T2 relaxation time has an abundance level of CL (%) and the component with the shorter T2 relaxation time has an abundance level of CS (%), the relative proportion RCS (%) defined by [{CS/(CS+CL)}×100] is in the range of 23.5% to 50.0%, both inclusive.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kenji Makino, Tomonari Nakayama, Keiko Abe, Katsuaki Kuge, Hijiri Hasegawa