Patents by Inventor Sumio Maruyama

Sumio Maruyama 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).

  • Birefringence improving agent, ferroelectric liquid crystal composition and liquid crystal display device using the agent, and compound
    Patent number: 9933679
    Abstract: A main object of the present invention is to provide a birefringence improving agent that can realize a satisfactory white display even in a liquid crystal display device in which a ferroelectric liquid crystal composition is used and which can reduce the birefringence and has a large cell gap; a ferroelectric liquid crystal composition and a liquid crystal display device that use the birefringence improving agent; and a compound that can be used in a ferroelectric liquid crystal composition.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: April 3, 2018
    Assignee: LC Vision, LLC
    Inventors: Naoki Sasou, Sumio Maruyama, Tetsunori Matsushita, Michael Wand
  • BIREFRINGENCE IMPROVING AGENT, FERROELECTRIC LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE USING THE AGENT, AND COMPOUND
    Publication number: 20160161817
    Abstract: A main object of the present invention is to provide a birefringence improving agent that can realize a satisfactory white display even in a liquid crystal display device in which a ferroelectric liquid crystal composition is used and which can reduce the birefringence and has a large cell gap; a ferroelectric liquid crystal composition and a liquid crystal display device that use the birefringence improving agent; and a compound that can be used in a ferroelectric liquid crystal composition.
    Type: Application
    Filed: July 17, 2013
    Publication date: June 9, 2016
    Inventors: Naoki SASOU, Sumio MARUYAMA, Tetsunori MATSUSHITA, Michael WAND
  • LIQUID PORPHYRIN DERIVATIVE, AND METHOD FOR PRODUCING THE SAME
    Publication number: 20110046366
    Abstract: The present invention is to provide a liquid porphyrin derivative at 25° C. and at temperatures from 26 to 40° C., and a method for producing the same.
    Type: Application
    Filed: March 10, 2009
    Publication date: February 24, 2011
    Inventors: Sumio Maruyama, Wataru Saito
  • Wedge pin
    Patent number: D422200
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: April 4, 2000
    Assignee: U Builders' Workshop Co., Ltd.
    Inventor: Sumio Maruyama