Patents by Inventor Yasuhiro Kiyonaga

Yasuhiro Kiyonaga 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: 4470828
    Abstract: An aqueous coal slurry composition is provided which comprises:(a) at least one compound selected from (a-1) a polyether polyol compound prepared by adding ethylene oxide and/or propylene oxide to an active hydrogen-containing compound, (a-2) a compound prepared by esterifying compound (a-1), (a-3) a compound prepared by phosphating, sulfating or carboxyalkylating compound (a-1) or a salt thereof, (a-4) a compound prepared by crosslinking compound (a-1) with a crosslinking agent, (a-5) a compound prepared by reacting compound (a-1) with epihalohydrin and (a-6) an isocyanate-terminated compound prepared by reacting compound (a-1) with a polyvalent isocyanate,(b) at least one surface active agent selected from (b-1) a sulfonation product of naphthalene or its salt or an aliphatic aldehyde addition condensate thereof, (b-2) an aliphatic aldehyde condensate of a sulfonic acid group-containing aminotriazine or its salt and (b-3) a sulfonation product of creosote oil or its salt or an aliphatic aldehyde addition co
    Type: Grant
    Filed: January 18, 1983
    Date of Patent: September 11, 1984
    Assignees: Kao Corporation, Lion Corporation
    Inventors: Masaaki Yamamura, Shinichi Watanabe, Yasuhiro Kiyonaga, Norio Fujii
  • Patent number: 3984445
    Abstract: Complex esters of the present invention are manufactured by making C.sub.3.sub.-30 olefin, carbon monoxide, polyalcohol and polycarboxylic acid react in the presence of a cobalt compound catalyst.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: October 5, 1976
    Assignee: Lion Fat & Oil Co., Ltd.
    Inventors: Hiroshi Isa, Takeo Inagaki, Yasuhiro Kiyonaga, Isamu Kadoya
  • Patent number: 3974194
    Abstract: In the method of manufacturing liquid polyol esters of carboxylic acid by making an olefin having 3 or more carbon atoms, carbon monoxide and polyhydric alcohol react with one another in the presence of a cobalt compound catalyst, the steps comprising heating the thus reacted mixture to distill out unreacted olefin and so forth, thereafter cooling the distillation residue and separating it into the ester of polyhydric alcohol and the cobalt compound.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: August 10, 1976
    Assignee: Lion Fat & Oil Co., Ltd.
    Inventors: Hiroshi Isa, Takeo Inagaki, Yasuhiro Kiyonaga, Masuzo Nagayama
  • Patent number: 3946055
    Abstract: In the method of manufacturing carboxylic acids or esters thereof by reacting olefin, carbon monoxide and alcohol or water in the presence of catalyst prepared in advance by heating a cobalt compound and pyridine or at least one pyridine base selected from the group of mono-, di- and tri-alkyl (having 1.about.3 carbon atoms)-substituted pyridines under the pressure of carbon monoxide.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: March 23, 1976
    Assignee: Lion Fat & Oil Co., Ltd.
    Inventors: Hiroshi Isa, Takeo Inagaki, Yasuhiro Kiyonaga, Masuzo Nagayama