Patents Assigned to Kureha Kagaku Kogyo Kabushiki Kaisha
  • Contact material for treating sewage of braided pile material
    Patent number: 4690849
    Abstract: Disclosed herein is a contact material for treating sewage, comprising a braid which is made of synthetic fibers and has loop piles, the weight of the synthetic fibers forming the loop piles being from 40 to 90% by weight of the synthetic fibers of the whole body of the braid.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: September 1, 1987
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Kureha Gosen Kabushiki Kaisha
    Inventors: Ken Fukuda, Hisaaki Ueba
  • Derivative of cephalosporanic acid and pharmaceutical composition comprising the same
    Patent number: 4690920
    Abstract: Disclosed herein are a derivative of a substituted cephalosporanic acid, represented by the formula (I): ##STR1## wherein p is 0, 1 or 2 and R.sup.1 represents a hydrogen atom, a hydroxyl group, a carbamoyl group, an alkyl group having 1 to 4 carbon atoms or --(CONH).sub.m (CH.sub.2).sub.n --COOH wherein m is 0 or 1; n is 0, 1 or 2 and the carboxyl group may have been converted to the salt or the ester thereof, and an antibiotic comprising a derivative of substituted cephalosporanic acid represented by the formula (I).
    Type: Grant
    Filed: December 20, 1983
    Date of Patent: September 1, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akihiko Kanno, Shigeaki Muto, Koichi Niimura, Takao Ando, Takayoshi Fujii, Masahiko Fujii, Takao Furusho, Chikao Yoshikumi
  • Derivatives of tetrahydrobenzothiazole and herbicidal compositions containing the same as an active ingredient
    Patent number: 4690704
    Abstract: Disclosed herein are a derivative of tetrahydrobenzothiazole represented by the formula (I): ##STR1## wherein R represents a methyl group or ethyl group; R.sup.1 represents a hydrogen atom, a hydroxyl group, methoxy group or O.dbd.=together with R.sup.2 ; R.sup.2 represents a hydrogen atom or O.dbd.=together with R.sup.1 ; and X represents a methylene group, hydroxymethylene group, carbonyl group or --O-- with the proviso that R is not a methyl group when (1) R.sup.1 represents a hydroxyl group or methoxy group and X represents a methylene group or hydroxymethylene group or (2) R.sup.2 represents .dbd.O together with R.sup.1 and X represents a carbonyl group, and a herbicidal composition containing the same as an active ingredient.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: September 1, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Katsumichi Aoki, Takafumi Shida, Hideo Arabori, Satoru Kumazawa, Susumu Shimizue, Takeo Watanave, Yohichi Kanda, Keigo Satake, Shiro Yamazaki, Hiroyasu Shinkawa, Tsuneaki Chida
  • Process for producing electrode substrate for use in fuel cells
    Patent number: 4687607
    Abstract: Disclosed herein is a process for producing a porous carbonaceous electrode substrate provided with elongated holes opening from one side to the opposite side of the electrode substrate through nearly the central region of the thickness of the substrate, for use in fuel cells, characterized by using high polymeric substance as a material for forming the elongated holes.
    Type: Grant
    Filed: March 15, 1985
    Date of Patent: August 18, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masatomo Shigeta, Kuniyuki Saitoh, Hiroyuki Fukuda
  • Dielectric films comprising stretched films of vinylidene fluoride and porcelain particles
    Patent number: 4687803
    Abstract: A dielectric film is a stretched body of a composition comprising a thermoplastic resin cross-linked to have a gel content of about 10 to about 75%, and finely divided dielectric porcelain particles dispersed in the thermoplastic resin. Stretching does not result in a decrease in the dielectric constant of the film and provides a great electrostatic capacitance. The dielectric film is manufactured by a method comprising the steps of cross-linking the thermoplastic resin of the composition containing the dielectric porcelain particles as well, and stretching the composition at a predetermined temperature selected in association with the thermoplastic resin.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: August 18, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshikichi Teramoto, Kenichi Nakamura, Naohiro Murayama
  • Process for preparing a carbonaceous five-layer fuel cell electrode substrate with elongated holes for feeding reactant gases
    Patent number: 4686072
    Abstract: Disclosed herein are processes for preparing electrode substrate for fuel cells which has an integratedly press molded five-layer structure comprising a porous carbonaceous layer, a dense carbonaceous layer having a bulk density larger than the porous layer, a separator, a dense carbonaceous layer having a bulk density larger than the porous layer, and a porous carbonaceous layer, and which further comprises a number of elongated holes for feeding reactant gases into a fuel cell in the interface between the porous layer and the dense layer.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: August 11, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Fukuda, Masatomo Shigeta, Hisatsugu Kaji, Kuniyuki Saitoh
  • Derivatives of .beta.-(4-isocyano-1,2,3,4-diepoxycyclopentyl) acrylic acid
    Patent number: 4684664
    Abstract: Disclosed herein are derivatives of .beta.-(4-isocyano-1,2,3,4-diepoxycyclopentyl)acrylic acid, the derivatives showing an antibacterial activity, an antifungal activity and an antimycoplasmal activity.
    Type: Grant
    Filed: January 16, 1985
    Date of Patent: August 4, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Katsuhisa Osugi, Isao Ichinose, Eisaku Takahashi, Masato Arahira
  • Pivaloyloxymethyl 7-.beta.-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-(2-amino-1, 3-thiadiazolyl-5-thiomethyl)-3-cepheme-4-carboxylate and pharmaceutical composition containing the same
    Patent number: 4681877
    Abstract: Disclosed herein are 7-beta-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-(2-amino-1,3,4- thiadiazolyl-5-thiomethyl)-3-cepheme-4-carboxylic acid, salts thereof and pivaloyloxymethyl ester thereof, and a pharmaceutical composition containing the same as an active ingredient.
    Type: Grant
    Filed: December 16, 1983
    Date of Patent: July 21, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shigeaki Muto, Takao Ando, Takayoshi Fujii, Akihiko Kanno, Yoko Onishi, Isamu Motokawa, Takao Furusho, Chikao Yoshikumi
  • Process for producing 2,6-naphthalenedicarboxylic acid
    Patent number: 4681978
    Abstract: Disclosed herein is a process for producing 2,6-naphthalenedicarboxylic acid, comprising (1) oxidizing 2,6-diisopropylnaphthalene in a lower fatty acid as a solvent in the presence of a catalyst comprising a water-soluble cobalt salt and/or a water-soluble manganese salt in an amount of at least 0.5 gram-atom of Co and/or Mn to 1 mol of 2,6-diisopropylnaphthalene by an oxygen-containing gas, thereby obtaining isopropylnaphthalene-monocarboxylic acid and (2) further oxidizing the thus obtained 6-isopropyl-2-naphthoic acid in the lower fatty acid in the presence of the catalyst comprising a water-soluble cobalt salt and/or a water-soluble manganese salt in an amount of from 0.0025 to 0.12 gram-atom to 1 mol of 6-isopropyl-2-naphthoic acid by the oxygen-containing gas, thereby obtaining 2,6-naphthalenedicarboxylic acid.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: July 21, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takashi Yamauchi, Shoichiro Hayashi, Atsushi Sasakawa
  • Porous and spherical carbonaceous product
    Patent number: 4681764
    Abstract: Disclosed herein is a novel porous and spherical carbonaceous product having acidic groups, basic groups, phenolic hydroxyl groups and carboxyl groups as functional groups at the following relationships:(1) the equivalent ratio of the acidic groups to the basic groups is in the range of 0.40 to 2.5 and(2) the value obtained by subtracting the amount of the carboxyl groups from the sum of the amounts of the basic groups and the phenolic hydroxylic groups is larger than 0.60, wherein the amount of the above-mentioned functional groups is expressed by milliequivalent/g of the product.The novel porous and spherical carbonaceous product having its groups in the above-mentioned relationships exhibits a specific adsorptive capability in living bodies and particularly useful as a pharmaceutical for treating diseases of the liver and kidney after administered orally.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: July 21, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Endo, Masao Katoh, Kuniaki Hino
  • Device for hyperthermia
    Patent number: 4676258
    Abstract: A device for radio-frequency hyperthermia havinga first electrode adapted to be disposed in a tract organ of a living body.A second electrode is provided which is adapted to be disposed on an outer circumference of the living body such that the second electrode is opposed to the first electrode such that there is generated a spatially inhomogeneous electric field within the living body in cooperation with the first electrode so that a part of the living body near the first electrode may be heated more strongly than a part of the living body near the second electrode.This serves to selectively heat a tumor or malignancy region at the deep inside of the living body by a noninvasive technique.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: June 30, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kiyoshi Inokuchi, Keizo Sugimachi, Toshiharu Shirakami, Hidenobu Kai, Yoshio Kawai, Tetsuya Hotta
  • Partially pressure-sensitized recording paper and process for preparing the same
    Patent number: 4677449
    Abstract: Disclosed herein are a recording paper which is partially pressure-sensitized, comprising microcapsules containing a solution of a colorless color former, sheet material and binder, the microcapsules being fixed to a specified part of a surface of the sheet material via the binder painted on the specified part and majority of the fixed microcapsules having at least a part of the microcapsule exposed to outside of the binder, and a process for producing the recording paper which is partially specified.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: June 30, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Okada, Yuriko Igarashi
  • Oxygen-cathode for use in electrolysis of alkali chloride and process for preparing the same
    Patent number: 4675094
    Abstract: Disclosed herein are an oxygen-cathode for use in electrolysis of an alkali chloride, comprising a current collector made of a compact carbonaceous material, an electrode substrate made of a porous carbonaceous material and the catalyst carried on the electrode substrate, wherein the electrode substrate and the current collector have been joined together via the mutually facing carbonized surfaces thereof, and a process for preparing the oxygen-cathode.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: June 23, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tetsuo Kaminaga, Masatomo Shigeta, Hiroyuki Fukuda
  • Pharmaceutical composition containing a derivative of para-aminobenzoic acid as an active ingredient
    Patent number: 4673669
    Abstract: Disclosed is a pharmaceutical composition containing an aminobenzoic acid derivative as an active ingredient represented by the following general formula: ##STR1## wherein .sup.1 R donotes one member selected from the group consisting of the residual groups formed by removing OH at 1(alpha) or 1(beta) position from arabinose, glucose, galactose and mannose, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: June 16, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Chikao Yoshikumi, Yoshio Ohmura, Fumio Hirose, Masanori Ikuzawa, Kenichi Matsunaga, Takayoshi Fujii, Minoru Ohhara, Takao Ando
  • Microcapsule for pressure-sensitive recording paper and process of preparing same
    Patent number: 4670344
    Abstract: A microcapsule enclosing a color-former solution for a pressure-sensitive recording paper is prepared by a process in which a water-soluble cationic urea resin and at least one of prepolymer selected from the group consisting of melamine-formaldehyde prepolymer, urea-formaldehyde prepolymer and melamine-urea-formaldehyde prepolymer are polycondensed on the surface of a dispersed solvent droplet containing a color-former in the presence of an anionic surfactant, while causing complex-coacervation between the water-soluble cationic urea resin and the anionic surfactant.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: June 2, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Okada, Yuriko Igarashi
  • Shaped article of vinylidene fluoride resin and process for preparing thereof
    Patent number: 4670527
    Abstract: Disclosed herein are a shaped article of vinylidene fluoride resin having an inherent viscosity of 0.85 to 1.4 dl/g, Huggins' constant of not more than 0.45, an average length of crystals in the direction of oriented molecular chains of the resin of longer than 200 .ANG., a birefringence of not less than 30.times.10.sup.-3 and a Young's modulus of not less than 450 kg/mm.sup.2 and a process preparing the shaped article comprising the steps of melt-extruding the resin, drafting the thus melt-extruded resin, and cooling the thus drafted resin.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: June 2, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Toshiya Mizuno
  • Derivatives of phenylacetic ester, a process for producing the same and insecticidal compositions containing the same as an active ingredient
    Patent number: 4668815
    Abstract: Disclosed herein are derivatives of phenylacetic ester represented by the formula (I): ##STR1## wherein R.sup.1 represents a halogen atom or a lower alkoxy group; R.sup.2 represents a lower alkyl group; R.sup.3 represents a hydrogen atom or a methyl group; R.sup.4 represents a hydrogen atom, a lower alkyl group, ##STR2## and R.sup.5 represents a hydrogen atom or a halogen atom, a process for producing the derivatives and an insecticidal composition containing the derivatives of phenylacetic ester as an active ingredient.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: May 26, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Enari, Yutaka Konai, Uichi Akiba, Masayo Ito
  • Novel antibiotic compound
    Patent number: 4668627
    Abstract: A novel antibiotic compoudn 3-(6-isocyano-3,7-dioxatricyclo[4.1.0.0.sup.2,4 ]hept-4-yl)propenoic acid is produced by a newly isolated microorganism belonging to the genus Penicillium.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: May 26, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Katsuhisa Ohsugi, Junji Ichida, Eisaku Takahashi
  • Shaped article of vinylidene fluoride resin and process for preparing thereof
    Patent number: 4667001
    Abstract: Disclosed herein are a shaped article of vinylidene fluoride resin, which having an average length of crystals in the direction of oriented molecular chains of the resin of longer than 200 .ANG., a birefringence of not less than 30.times.10.sup.-3 and a Young's modulus of not less than 450 kg/mm.sup.2 and a process preparing the shaped article comprising the steps of melt-extruding the resin, drafting the thus melt-extruded resin, and cooling the thus drafted resin.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: May 19, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Toshiya Mizuno
  • Aqueous solution as an eluent used in liquid chromatography
    Patent number: 4666861
    Abstract: Disclosed is an aqueous solution as an eluent used in liquid chromatography for analysis of a specimen obtained from a human living body, comprising a mixture of acetonitrile and an aqueous solution of a member selected from the group consisting of acetic acid, a polybasic organic acid, a salt of organic acid and ammonium carbonate.
    Type: Grant
    Filed: November 5, 1985
    Date of Patent: May 19, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Junichi Koshugi