Patents by Inventor Tsutomu Asaoka

Tsutomu Asaoka 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).

  • Water soluble algin fibers and production thereof
    Patent number: 5585059
    Abstract: There is disclosed water soluble algin fibers and such fibers which have antibiotics immobilized thereto. The water soluble algin fibers are produced by extruding an aqueous dope which contains water soluble algin therein into a large quantity of a hydrophilic organic solvent exemplified by acetone. The water soluble algin fibers which have antibiotics immobilized thereto are produced in the same manner by using a dope containing antibiotics.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: December 17, 1996
    Assignees: Sakai Chemical Industry Co., Ltd., Agency of Industrial Science and Technology
    Inventors: Yoshinari Kobayashi, Hiroshi Kamishima, Satoshi Fukuoka, Hideki Obika, Tsutomu Asaoka, Keishi Tenma
  • Water soluble algin fibers and production thereof
    Patent number: 5474781
    Abstract: There is disclosed water soluble algin fibers and such fibers which have antibiotics immobilized thereto. The water soluble algin fibers are produced by extruding an aqueous dope which contains water soluble algin therein into a large quantity of a hydrophilic organic nonsolvent exemplified by acetone. The water soluble algin fibers which have antibiotics immobilized thereto are produced in the same manner by using a dope containing antibiotics.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: December 12, 1995
    Assignees: Sakai Chemical Industry Co., Ltd., Agency of Industrial Science & Technology
    Inventors: Yoshinari Kobayashi, Hiroshi Kamishima, Satoshi Fukuoka, Hideki Obika, Tsutomu Asaoka, Keishi Tenma
  • Process for preparing metal salts of alkyl phosphates
    Patent number: 4163018
    Abstract: A process for preparing metal salts of alkyl phosphate of either one of the formulae: ##STR1## WHICH COMPRISES REACTING AN ALKYL PHOSPHATE OF EITHER ONE OF THE FORMULAE: ##STR2## in the form of its alkali metal salt with a metal salt of the formula: M.sub.n X.sub.m in an aqueous medium at a temperature of from about 50.degree. to 80.degree. C. (wherein R is an alkyl group of not less than 12 carbon atoms, M is an alkaline earth metal, aluminum or zinc, X is halogen ion, sulfate ion or nitrate ion, l is an integer corresonding to the atomic valency of M, r is an integer of 0, 1 or 2, m is an integer of 1, 2 or 3 and n is an integer of 1 or 2).
    Type: Grant
    Filed: December 13, 1977
    Date of Patent: July 31, 1979
    Assignee: Sakai Chemical Industry Company, Ltd.
    Inventors: Fusao Tada, Jajimu Shimizu, Tsutomu Asaoka, Fuminori Matsumoto