Patents by Inventor Tsugunori Honda

Tsugunori Honda 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).

  • Drilling fluid additives
    Patent number: 4594169
    Abstract: Drilling fluid additives are prepared by complexing humic acids and/or lignins, with three compounds of zirconium, nickel and iron. The metal composition of the additives is 1.3 to 2.5% of zirconium, 0.8 to 1.5% of nickel and 0.8 to 1.5% of iron, and is totally 3.0 to 5.5%. Thus, the drilling fluid additives, containing no chromium, can be used in wide temperature range for the drilling of oil, geothermal or gas wells with less gelation even by various contamination and cause no serious environmental pollution.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: June 10, 1986
    Assignee: Japan Metals and Chemicals Co., Ltd.
    Inventors: Yoshizi Saito, Masaru Nakamura, Toyoshi Iida, Tsugunori Honda
  • Process for producing ferrites
    Patent number: 4472369
    Abstract: Ferrite having a uniform degree of oxidation is produced at a higher rate of ferrite forming reaction by pelletizing a mixture of iron oxide and ferromanganese powders and calcining the mixture at a temperature of 900.degree. C. or higher. Zinc oxide, magnesium oxide and/or nickel oxide may be further added to the mixture, as required.
    Type: Grant
    Filed: February 2, 1983
    Date of Patent: September 18, 1984
    Assignee: Japan Metals and Chemicals Co., Ltd.
    Inventors: Koichi Kambe, Tsugunori Honda, Toshio Toyota, Mitsuharu Tominaga, Koichi Yoshioka