Patents by Inventor Kenji Rakutani

Kenji Rakutani 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).

  • Patent number: 6346509
    Abstract: A higher secondary alcohol alkoxylate compound composition represented by the general formula (1): [wherein R1 and R2 represent an alkyl group provided that the total number of carbon atoms of R1 and R2 is in the range of 7 to 29 and the number of carbon atom of R2 is not less than that of R1 (the number of carbon atom of R1<the number of carbon atom of R2), A represents a lower alkylene group, n represents a numeral in the range of 1 to 50 on the average; providing that when n is not less than 2, the number of species of oxyalkylene group represented by AO may be either one or two or more, and that when the oxyalkyl groups have two or more species, all the oxyalkylene groups are present in the average of n, and B represents a hydrogen atom or SO3M (wherein M represents an alkali metal atom, an alkaline earth metal atom, an ammonium group or a substituted ammonium group)], wherein the composition comprises 30 to 90 mol % of the higher secondary alcohol alkoxylate compound (X) ha
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: February 12, 2002
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yukio Kadono, Kunihiko Kimata, Kenji Rakutani, Yoshiyuki Onda
  • Patent number: 6278007
    Abstract: A (poly)alkylene glycol higher alkyl ether derivative composition characterized by comprising 30-90 mol. % of (B1) (poly)alkylene glycol higher alkyl ether derivative and 70-10 mol.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: August 21, 2001
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Toru Inaoka, Kenji Rakutani, Yukio Kadono, Yoshiyuki Onda
  • Patent number: 6255275
    Abstract: A higher secondary alcohol alkoxylate compound composition represented by the general formula (1): , wherein the composition comprises 30 to 90 mol % of the higher secondary alcohol alkoxylate compound (X) having a methyl group for R1 and 70 to 10 mol % of the higher secondary alcohol alkoxylate compound (Y) having an alkyl group of 2 or more carbon atoms for R1, a method for the production thereof, and a detergent and an emulsifier using the composition.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: July 3, 2001
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yukio Kadono, Kunihiko Kimata, Kenji Rakutani, Yoshiyuki Onda
  • Patent number: 6017875
    Abstract: A higher secondary alcohol alkoxylate compound composition represented by the general formula (1): ##STR1## [wherein R.sup.1 and R.sup.2 represent an alkyl group provided that the total number of carbon atoms of R.sup.1 and R.sup.2 is in the range of 7 to 29 and the number of carbon atom of R.sup.2 is not less than that of R.sup.1 (the number of carbon atom of R.sub.1 .ltoreq.the number of carbon atom of R.sub.2), A represents a lower alkylene group, n represents a numeral in the range of 1 to 50 on the average; providing that when n is not less than 2, the number of species of oxyalkylene group represented by AO may be either one or two or more, and that when the oxyalkyl groups have two or more species, all the oxyalkylene groups are present in the average of n, and B represents a hydrogen atom or SO.sub.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: January 25, 2000
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yukio Kadono, Kunihiko Kimata, Kenji Rakutani, Yoshiyuki Onda
  • Patent number: 5641847
    Abstract: A swellable oil-absorbent agent formed of a cross-linked polymer (P) obtained by polymerizing a monomer component comprising 90 to 99.999% by weight of a monomer having as a main moiety thereof an alkyl (meth)acrylate the alkyl group of which has 10 to 16 carbon atoms and possessing one polymerizable unsaturated group in the molecular unit thereof and 0.001 to 10% by weight of a cross-linkable monomer possessing at least two polymerizable unsaturated groups in the molecular unit thereof (providing that the total of the amount of the polymerizable monomer and that of the cross-linkable monomer is 100% by weight).
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: June 24, 1997
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Yoshiyuki Hozumi, Toru Inaoka, Tomoki Gomi, Takakiyo Goto, Toru Uno, Kenji Rakutani
  • Patent number: 5374600
    Abstract: A swellable oil-absorbent agent formed of cross-linked polymer (P) obtained by polymerizing a monomer component comprising 90 to 99.999% by weight of a monomer having as a main moiety thereof an alkyl (meth)acrylate the alkyl group of which has 10 to 16 carbon atoms and possessing one polymerizable unsaturated group in the molecular unit thereof and 0.001 to 10% by weight of a cross-linkable monomer possessing at least two polymerizable unsaturated groups in the molecular unit thereof (providing that the total of the amount of the polymerizable monomer and that of the cross-linkable monomer is 100% by weight).
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: December 20, 1994
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Yoshiyuki Hozumi, Toru Inaoka, Tomoki Gomi, Takakiyo Goto, Toru Uno, Kenji Rakutani
  • Patent number: 4872885
    Abstract: This invention discloses (1) a dispersant for an aqueous carbonaceous solid slurry, which comprises a water-soluble copolymer having an average molecular weight of 1,000 to 500,000 and obtained by polymerizing (A) 0.1 to 7 mol % of a polyalkylene glycol mono(meth)acrylate type monomer, (B) 5 to 94.9 mol % of a sulfoalkyl (meth)acrylate type monomer, (C) 5 to 94.9 mol % of an unsaturated carboxylic acid type monomer, and (D) 0 to 20 mol % of other monomer (providing that the total amount of the monomers is 100 mol %) and/or a salt of the water-soluble copolymer and (2) an aqueous carbonaceous solid slurry composition, which comprises 100 parts by weight of as carbonaceous solid and 0.01 to 5 parts by weight of the aforementioned dispersant.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: October 10, 1989
    Assignees: Kawasaki Jukogyo Kagushiki Kaisha, Nippon Shokubai Kabaku Kogyo Co., Ltd.
    Inventors: Tsuneo Tsubakimoto, Hayami Ito, Shuhei Tatsumi, Yoshihiro Kajibata, Shoichi Takao, Takakiyo Goto, Akio Nakaishi, Kenji Rakutani, Toshio Tamura, Hiroya Kobayashi