Patents by Inventor Keita NAKASHI

Keita NAKASHI 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).

  • LUBRICANT COMPOSITION
    Publication number: 20230250355
    Abstract: A lubricant composition containing a base oil, an alkyl benzene sulfonate metal salt, and an alkyl naphthalene sulfonate metal salt, wherein a total content of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt is 1 to 2.2% by mass, and a mass fraction of the alkyl benzene sulfonate metal salt to a total mass of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt is 0.3 or more.
    Type: Application
    Filed: June 3, 2021
    Publication date: August 10, 2023
    Applicant: NOK KLUEBER CO., LTD.
    Inventors: Akihiko SHIMURA, Toshio NITTA, Keita NAKASHI
  • Lubricant composition
    Patent number: 10633608
    Abstract: A lubricant composition includes a perfluoropolyether as a base oil, a fluororesin as a thickener, and a polyol ester, a urea grease and a zinc dialkyldithiophosphate as additives, wherein a mass ratio of content of the perfluoropolyether to total content of the polyol ester and the urea grease ranges from 78/22 to 95/5, a mass ratio of content of the perfluoropolyether to content of the polyol ester ranges from 90/10 to 96.5/3.5, a mass ratio of content of the polyol ester to content of the urea grease ranges from 40/60 to 65/35, content of the fluororesin ranges from 15 mass % to 24 mass % based on a total amount of the lubricant composition, and content of the zinc dialkyldithiophosphate ranges from 0.5 mass % to 4 mass % based on the total amount of the lubricant composition.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: April 28, 2020
    Assignees: NOK KLUEBER CO., LTD., NSK LTD.
    Inventors: Takeshi Hishinuma, Keita Nakashi, Nobuaki Izawa, Miwa Komatsu
  • LUBRICANT COMPOSITION
    Publication number: 20180273871
    Abstract: A lubricant composition includes a perfluoropolyether as a base oil, a fluororesin as a thickener, and a polyol ester, a urea grease and a zinc dialkyldithiophosphate as additives, wherein a mass ratio of content of the perfluoropolyether to total content of the polyol ester and the urea grease ranges from 78/22 to 95/5, a mass ratio of content of the perfluoropolyether to content of the polyol ester ranges from 90/10 to 96.5/3.5, a mass ratio of content of the polyol ester to content of the urea grease ranges from 40/60 to 65/35, content of the fluororesin ranges from 15 mass % to 24 mass % based on a total amount of the lubricant composition, and content of the zinc dialkyldithiophosphate ranges from 0.5 mass % to 4 mass % based on the total amount of the lubricant composition.
    Type: Application
    Filed: June 1, 2018
    Publication date: September 27, 2018
    Inventors: Takeshi HISHINUMA, Keita NAKASHI, Nobuaki IZAWA, Miwa KOMATSU