Patents by Inventor Naohumi Izumi

Naohumi Izumi 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).

  • Molding material composed of polyorganosiloxane compound, sealing material, and sealed optical device
    Patent number: 8507044
    Abstract: A molding material includes a polyorganosiloxane compound having a ladder structure including a repeating unit shown by the following formula (I) in the molecule as a main component, a sealing material includes the molding material, and a sealed optical device includes an optical device that is sealed with a cured product of the sealing material. The molding material produces a cured product that exhibits excellent transparency and heat resistance for a long time. wherein A represents a single bond or a linking group, R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, X0 represents a halogen atom, a haloalkyl group having 1 to 10 carbon atoms, or a cyano group, R2 represents a substituted or unsubstituted phenyl group, an alkyl group having 1 to 20 carbon atoms which may have a substituent (excluding a halogen atom and a cyano group), or an alkenyl group having 2 to 20 carbon atoms, and l, m, and n are arbitrary positive numbers, provided that l and n are not 0 at the same time.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: August 13, 2013
    Assignee: Lintec Corporation
    Inventors: Mikihiro Kashio, Takashi Tamada, Naohumi Izumi
  • MOLDING MATERIAL COMPOSED OF POLYORGANOSILOXANE COMPOUND, SEALING MATERIAL, AND SEALED OPTICAL DEVICE
    Publication number: 20110034659
    Abstract: A molding material includes a polyorganosiloxane compound having a ladder structure including a repeating unit shown by the following formula (I) in the molecule as a main component, a sealing material includes the molding material, and a sealed optical device includes an optical device that is sealed with a cured product of the sealing material. The molding material produces a cured product that exhibits excellent transparency and heat resistance for a long time. wherein A represents a single bond or a linking group, R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, X0 represents a halogen atom, a haloalkyl group having 1 to 10 carbon atoms, or a cyano group, R2 represents a substituted or unsubstituted phenyl group, an alkyl group having 1 to 20 carbon atoms which may have a substituent (excluding a halogen atom and a cyano group), or an alkenyl group having 2 to 20 carbon atoms, and l, m, and n are arbitrary positive numbers, provided that l and n are not 0 at the same time.
    Type: Application
    Filed: December 24, 2008
    Publication date: February 10, 2011
    Applicant: LINTEC CORPORATION
    Inventors: Mikihiro Kashio, Takashi Tamada, Naohumi Izumi