Patents by Inventor Takeo Ohmiya

Takeo Ohmiya 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).

  • Quaternary ammonium salts of carboxymethylcellulose
    Patent number: 4617385
    Abstract: A quaternary ammonium salt of carboxymethylcellulose having the formula ##STR1## wherein R is a hydrogen atom or a quaternary ammonio carboxymethyl group, and n is an integer from 10 to 1000, provided that a degree of substitution by carboxymethyl group per anhydrous glucose unit in said carboxymethylcellulose is 1.5 or more.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: October 14, 1986
    Assignee: Daicel Chemical Industries Ltd.
    Inventors: Hajime Namikoshi, Takeo Ohmiya
  • Sodium carboxymethylcellulose
    Patent number: 4525585
    Abstract: Sodium carboxymethylcellulose is disclosed wherein the average degree of substitution (DS) of carboxymethyl groups per anhydroglucose unit is in the range of 0.4 to 1.6, the number-average degree of polymerization is in the range of 100 to 1,500, and the mobility distribution (.DELTA.U) as measured by electrophoresis is represented by the following formula:.DELTA.U.times.10.sup.5 <(-3.0 logDS+3.20).times.10.sup.5 cm.sup.2 /sec.multidot.V.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: June 25, 1985
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Atsushi Taguchi, Takeo Ohmiya
  • Process for preparing alkali metal salt of carboxymethyl cellulose ether
    Patent number: 4063018
    Abstract: An alkali metal salt of carboxymethyl cellulose ether is prepared by dissolving an alkali in a water-containing organic solvent, adding starting cellulose to the solution, stirring the mixture to form a slurry of the alkali cellulose and then reacting it with an etherifying agent. Alternatively, it is prepared by reacting the starting cellulose in a water-containing solvent with sodium monochloroacetate as an etherifying agent, in the presence of an alkali.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: December 13, 1977
    Assignee: Daicel Ltd.
    Inventors: Kouichi Ohnaka, Shigeo Yokoi, Takeo Ohmiya
  • Sodium carboxymethylcellulose
    Patent number: RE32976
    Abstract: Sodium carboxymethylcellulose is disclosed wherein the average degree of substitution (DS) of carboxymethyl groups per anhydroglucose unit is in the range of 0.4 to 1.6, the number-average degree of polymerization is in the range of 100 to 1,500, and the mobility distribution (.DELTA.U) as measured by electrophoresis is represented by the following formula: .[..DELTA.U.times.10.sup.5 <(-3.0 logDS+3.20).times.10.sup.5 cm.sup.2 /sec.multidot.V..]. .Iadd..DELTA.U.times.10.sup.5 <(-3.0 logDS+3.20)cm.sup.2 /sec.multidot.V. .Iaddend.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: July 4, 1989
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Atsushi Taguchi, Takeo Ohmiya