Patents by Inventor Kazumasa Ibi

Kazumasa Ibi 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).

  • Extreme-pressure additive, process for producing the same, cutting fluid, and grinding fluid
    Patent number: 6413917
    Abstract: The present invention provides a sulfur-based extreme-pressure additive that is completely soluble in water without using a surfactant, and has satisfactory odor and hue. In addition, the present invention provides a cutting liquid and grinding liquid having superior defoaming property and rust preventive characteristics, while also having high load resistance and lubrication performance comparable to cutting oils and grinding oils of the prior art. The above objects are achieved by an extreme-pressure additive comprising the salt of a condensation product of a sulfurized hydroxy-unsaturated fatty acid, the condensation product having a sulfur content of 8 to 15% by weight (mass), color of 6 or less, and acid value of 80 to 200, and a grinding liquid comprising that extreme-pressure additive and water.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: July 2, 2002
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Shigeru Yamada, Kazumasa Ibi