Patents by Inventor Masami Kubo

Masami Kubo 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).

  • LUBRICATING OIL CONTAINING ALKYL PHOSPHONIC ACID
    Publication number: 20240101923
    Abstract: This disclosure describes a zinc-free lubricating oil composition. The composition includes a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 1.5 to about 35 mm2/s and an anti-wear mixture having one or more ashless dispersants and an alkyl phosphonic acid having a structure given by wherein R is a C3-C20 hydrocarbyl group. The initial pH of the anti-wear mixture is between 5-9.5 as measured by ASTM D664.
    Type: Application
    Filed: September 14, 2021
    Publication date: March 28, 2024
    Applicant: CHEVRON JAPAN LTD.
    Inventors: Masami FUCHI, Naoya SASAKI, Takahiro NAKAGAWA, Satoshi OHTA, Naoki MASUDA, Koichi KUBO
  • Agent for prophylaxis and treatment of cardiac hypertrophy
    Patent number: 4888339
    Abstract: Novel agent for the propylaxis and treatment of heart failure, which comprises as an active ingredient a 2-oxo-imidazolidine compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each a lower alkyl group, R.sup.3 is a phenyl-substituted lower alkyl group, and R.sup.4 is a hydrogen atom or a lower alkyl group, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: December 19, 1989
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Masami Kubo, Takashi Ochiai, Hirofumi Yuasa
  • 2-oxo-imidazolidine derivatives as agents for treatment of kidney diseases
    Patent number: 4804672
    Abstract: Novel agent for the treatment of kidney diseases, which comprises as an active ingredient a 2-oxo-imidazolidine compound of the formula: ##STR1## wherein R.sup.1 is a lower alkyl group, R.sup.2 is a lower alkyl group, R.sup.3 is a phenyl-substituted lower alkyl group, and R.sup.4 is hydrogen atom or a lower alkyl group, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: February 14, 1989
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Isao Yamaguchi, Shinsuke Nishiyama, Masami Kubo