Patents by Inventor Kunio Kawakatsu

Kunio Kawakatsu 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).

  • Hydraulic fluid compositions comprising borate esters of oxyalkylated heterocyclic or alicyclic amines
    Patent number: 4298487
    Abstract: Hydraulic fluid compositions having improved properties to rubbers are formed from (A) a nitrogen-atom-containing borate ester derived from an oxyalkylated heterocyclic or alicyclic amine and (B) another borate ester and/or polyoxyalkylene compound.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: November 3, 1981
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Fumihide Genjida, Kunio Kawakatsu, Motohiko Ii
  • Hydraulic fluid comprising a borate ester and corrosion inhibiting amounts of an oxyalkylated alicyclic amine
    Patent number: 4173542
    Abstract: Hydraulic fluid compositions having improved non-corrosive properties to metals are formed from (A) a hydraulic fluid containing a borate ester and (B) an oxyalkylated alicyclic amine.
    Type: Grant
    Filed: May 19, 1978
    Date of Patent: November 6, 1979
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Teruyuki Sato, Kunio Kawakatsu
  • Hydraulic fluid compositions comprising borate esters
    Patent number: 4116846
    Abstract: Hydraulic fluid compositions having a high boiling point and a boron content of 0.2 to 1.6% by weight are formed from (a) a reaction product of (i) a polyalkylene glycol monoalkyl ether, (ii) a polyalkylene glycol or (iii) a polyoxyalkylene mono- or poly- ol having a molecular weight of 1000 to 5000, with (iv) a boron compound; (b) a polyalkylene glycol monoalkyl ether; (c) a polyalkylene glycol and (d) a polyoxyalkylene mono- or poly- ol having a molecular weight of 1000 to 5000.
    Type: Grant
    Filed: May 24, 1977
    Date of Patent: September 26, 1978
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Teruyuki Sato, Kunio Kawakatsu