Patents by Inventor Keigo Kajiwara

Keigo Kajiwara 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).

  • Patent number: 11931434
    Abstract: An oil-in-water type sunscreen cosmetic containing the following component (A) and the following component (B): (A) 1% by mass or more and 40% by mass or less of emulsion particles containing an oil soluble ultraviolet ray absorbent (a1), having an average particle diameter of more than 6 ?m and 300 ?m or less, and (B) 0.3% by mass or more and 2.5% by mass or less of particles containing an oil soluble ultraviolet ray absorbent (b3) encompassed by an ionic surfactant (b1) and a hydrophobic amphiphilic substance (b2), having a content of a solid oil agent of 2.5% by mass or less based on the total amount of the particles, having an average particle diameter of 6 ?m or less.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: March 19, 2024
    Assignee: KAO CORPORATION
    Inventors: Keigo Kajiwara, Shinichi Tsukii, Shingo Hirono, Takuji Enomoto
  • Publication number: 20220226212
    Abstract: [1] An external skin preparation for IR protection, an external skin preparation for heat insulation, an external skin preparation for photoaging prevention, an external preparation for skin temperature increase prevention, an external skin preparation for fatigue prevention and an external skin preparation for active oxygen production prevention, containing a tabular metal oxide (A) having a thickness of 30 to 360 nm, and [2] an external skin preparation containing a tabular metal oxide (A) having a thickness of 30 nm or more and 360 nm or less and an aspect ratio of 50 or more and 300 or less, and a nonvolatile oil (B) in a ratio by mass [(A)/(B)] of 0.05 to 5.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 21, 2022
    Applicant: KAO CORPORATION
    Inventors: Takashi FUKUI, Tomonari OKADA, Noriko TEJIMA, Keigo KAJIWARA
  • Publication number: 20220031582
    Abstract: An oil-in-water type sunscreen cosmetic containing the following component (A) and the following component (B): (A) 1% by mass or more and 40% by mass or less of emulsion particles containing an oil soluble ultraviolet ray absorbent (a1), having an average particle diameter of more than 6 ?m and 300 ?m or less, and (B) 0.3% by mass or more and 2.5% by mass or less of particles containing an oil soluble ultraviolet ray absorbent (b3) encompassed by an ionic surfactant (b1) and a hydrophobic amphiphilic substance (b2), having a content of a solid oil agent of 2.5% by mass or less based on the total amount of the particles, having an average particle diameter of 6 ?m or less.
    Type: Application
    Filed: September 30, 2019
    Publication date: February 3, 2022
    Applicant: KAO CORPORATION
    Inventors: Keigo KAJIWARA, Shinichi TSUKII, Shingo HIRONO, Takuji ENOMOTO
  • Patent number: 8343466
    Abstract: Hydrogel particles include a continuous phase portion of non-crosslinked hydrogel and disperse phase portions dispersed in the continuous phase portion. Each of the disperse phase portions contains a solid oil and a liquid oil as an oil component, and titanium oxide particles dispersed therein. The solid oil of the oil component contains a higher alcohol and a solid paraffin, and the content of the solid oil in the disperse phase portion is 1 to 12 mass %. The hydrogel particles have a volume-average particle diameter of 10 to 300 ?m.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: January 1, 2013
    Assignee: Kao Corporation
    Inventors: Michiya Takagi, Kimikazu Fukuda, Koji Mine, Keigo Kajiwara, Yoko Nakajima, Yukio Inomata
  • Patent number: 8142768
    Abstract: The invention relates to a cosmetic preparation containing a crosslinked (meth) acrylic acid ester resin powder having a compression strength of 0.7 to 10 kgf/mm2. The invention also relates to a cosmetic preparation, for example, in the form of a cosmetic sheet, powder spray cosmetic, gel cosmetic, two phase separable cosmetic, emulsion cosmetic or the like.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: March 27, 2012
    Assignee: Kao Corporation
    Inventors: Toyoki Hagura, Keigo Kajiwara, Takashi Hori, Satoshi Tsunakawa, Tetsuji Kito
  • Publication number: 20110236446
    Abstract: Hydrogel particles include a continuous phase portion of non-crosslinked hydrogel and disperse phase portions dispersed in the continuous phase portion. Each of the disperse phase portions contains a solid oil and a liquid oil as an oil component, and titanium oxide particles dispersed therein. The solid oil of the oil component contains a higher alcohol and a solid paraffin, and the content of the solid oil in the disperse phase portion is 1 to 12 mass %. The hydrogel particles have a volume-average particle diameter of 10 to 300 ?m.
    Type: Application
    Filed: November 19, 2009
    Publication date: September 29, 2011
    Applicant: Kao Corporation
    Inventors: Michiya Takagi, Kimikazu Fukuda, Koji Mine, Keigo Kajiwara, Yoko Nakajima, Yukio Inomata
  • Publication number: 20050266057
    Abstract: The invention relates to a cosmetic preparation containing a crosslinked (meth) acrylic acid ester resin powder having a compression strength of 0.7 to 10 kgf/mm2. The invention also relates to a cosmetic preparation, for example, in the form of a cosmetic sheet, powder spray cosmetic, gel cosmetic, two phase separable cosmetic, emulsion cosmetic or the like.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 1, 2005
    Applicant: KAO CORPORATION
    Inventors: Toyoki Hagura, Keigo Kajiwara, Takashi Hori, Satoshi Tsunakawa, Tetsuji Kito