Patents by Inventor Hirotsugu Nakanishi

Hirotsugu Nakanishi 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).

  • GUARD COLUMN AND METHOD FOR PRODUCING GUARD COLUMN
    Publication number: 20220023832
    Abstract: Provided is a guard column including a filling part having a length of 2.0 cm to 3.5 cm formed of a filler, in which the filler is made of porous silica gel having a hydrophilized surface and an average particle size of 1.5 ?m to 2.5 ?m, and a pressure difference when an aqueous solution is fed at a linear flow rate of 2.1 cm/min is 4.0 MPa or more.
    Type: Application
    Filed: November 11, 2019
    Publication date: January 27, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Hirotsugu NAKANISHI, Ritsuko WAKAYAMA
  • Skin agent for external use and cosmetic agent including ubiquinone derivative or salt thereof and method using the same
    Patent number: 8551509
    Abstract: A skin agent for external use and a cosmetic agent are provided, by transdermal administration of which expected actions and effects of ubiquinone derivatives, salts thereof, ubiquinones and ubiquinols are effectively obtained. The skin agent for external use includes a ubiquinone derivative or a salt thereof as an active ingredient. The ubiquinone derivative is represented by the formula (1): wherein R1 and R2 are each a hydrogen atom or a phosphoric group, at least one of R1 and R2 is a phosphoric group, and n is an integer in the range of 1 to 9.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: October 8, 2013
    Assignee: Showa Denko K.K.
    Inventors: Hirobumi Aoki, Yohei Kurata, Harumi Kamachi, Hirotsugu Nakanishi
  • SKIN AGENT FOR EXTERNAL USE AND COSMETIC AGENT INCLUDING UBIQUINONE DERIVATIVE OR SALT THEREOF AND METHOD USING THE SAME
    Publication number: 20100074879
    Abstract: A skin agent for external use and a cosmetic agent are provided, by transdermal administration of which expected actions and effects of ubiquinone derivatives, salts thereof, ubiquinones and ubiquinols are effectively obtained. The skin agent for external use includes a ubiquinone derivative or a salt thereof as an active ingredient. The ubiquinone derivative is represented by the formula (1): wherein R1 and R2 are each a hydrogen atom or a phosphoric group, at least one of R1 and R2 is a phosphoric group, and n is an integer in the range of 1 to 9.
    Type: Application
    Filed: October 15, 2007
    Publication date: March 25, 2010
    Applicant: SHOWA DENKO K.K.
    Inventors: Hirobumi Aoki, Yohei Kurata, Harumi Kamachi, Hirotsugu Nakanishi