Patents Assigned to Kureha Kagaku Kogyo Kabushiki Kaisha
  • Capacitor
    Patent number: 4439811
    Abstract: The capacitor contains a film layer comprising essentially a vinylidene fluoride resin and a coating layer composed of a mixture of the vinylidene fluoride resin and a polymer substantially incompatible with the vinylidene fluoride resin and having a critical surface tension of 30 dyn/cm or higher.The capacitor components as set forth hereinabove can render the capacitor compact without decreasing the performance inherent in the polyvinyl fluoride resin.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: March 27, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tohru Sasaki, Mutsuru Ohta, Syuuzi Terasaki, Shozo Kakizaki
  • Cephalosporin derivative and pharmaceutical composition containing the derivative
    Patent number: 4439434
    Abstract: A compound having the general formula (I) is derived from a cephalosporin; ##STR1## wherein R' is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkali metal.A pharmaceutical composition containing the compound is excellent in an antibacterial activity, the activity being recovered by the action of an activating enzyme in a living body although the compound per se shows a low activity against the beneficial bacterial colonies in a living body.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: March 27, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shigeaki Muto, Kouichi Niimura, Takao Ando, Masahiko Fujii, Takao Furusho, Chikao Yoshikumi
  • Catalyst for dehydrocoupling of toluene or xylene
    Patent number: 4438021
    Abstract: Disclosed herein is a catalyst suitable for dehydrocoupling of toluene or xylene, represented by the general formula (I):M.sub.a Tl.sub.b O.sub.c (I),wherein M represents yttrium, zinc or zirconium; a denotes a number in a range of 0.25 to 5, b denotes 1, and c denotes a number necessary for fulfilling the respective average atomic valencies of M and Tl in the oxidation states in which they exist in the composition represented by the formula (I), and a process for dehydrocoupling of toluene or xylene in the presence of the catalyst represented by the general formula (I).
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: March 20, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Okada, Takashi Terauchi, Makoto Naoki, Masatoshi Hino
  • Dielectric film
    Patent number: 4435475
    Abstract: A film prepared by molding a resin compound of a polyvinylidene fluoride admixed with a polycarbonate and/or a thermoplastic polyester and stretching into at least one direction is disclosed. The film shows excellent dielectric properties.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: March 6, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tohru Sasaki, Syuuzi Terasaki, Hideo Munakata, Mitsuru Ohta
  • Shaped articles of porous carbon fibers
    Patent number: 4434206
    Abstract: Disclosed herein are shaped articles of porous carbon comprising carbon fibers having a compression strength of higher than 50 kg/cm.sup.2 and a porosity of 50 to 80%, in which radii of not less than 60% of the pores are distributed in a range wherein the difference between the upper pore radius and the lower pore radius is 20 microns.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: February 28, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Fukuda, Hisatsugu Kaji, Hiroto Fujimaki
  • 2-Substituted-phenyl-5-alkylthiazolidine-4-one
    Patent number: 4434172
    Abstract: Compounds of 2-substituted-phenyl-5-alkylthiazolidine-4-one having the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 represent respectively a lower alkyl group of 1 to 3 carbon atoms and n denotes an integer of 1 to 3 possess anti-peptic ulcer activity.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: February 28, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takao Kawasaki, Yoshiaki Osaka, Katsumi Komatsu, Yukiharu Yamaguchi, Saichi Ono
  • Capacitor
    Patent number: 4434209
    Abstract: Capacitor having layers of dielectric material containing at least one oriented film prepared by molding a resin composition comprising polyvinylidene fluoride, polycarbonate and/or thermoplastic polyester into un-stretched film and stretching the thus molded un-stretched film as at least a part of the constituents of the layer of dielectric material is disclosed.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: February 28, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tohru Sasaki, Mitsuru Ohta, Syuuzi Terasaki, Syozo Kakizaki
  • Article selection apparatus
    Patent number: 4432457
    Abstract: An article selection apparatus is disclosed having a first conveying device for conveying an article along a path and a second conveying device for receiving the article at an entrance end spaced apart by a predetermined distance from a conveying end of the first conveying device and for conveying the received article, wherein the first conveying device has a gap extending along the conveying path to the conveying end thereof, and a width of the gap is made smaller than the predetermined distance from the conveying end of the first conveying device to the entrance of the second conveying device.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: February 21, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yuji Sawa, Yozo Kudo
  • Method and apparatus for measuring interfacial electrokinetic phenomena
    Patent number: 4433299
    Abstract: A method and apparatus are disclosed for measuring interfacial electrokinetic phenomena such as electrophoresis by applying stationary electric field to a sample, wherein the voltage between two points in the sample other than the electrodes for an electric current application is detected and the electric current is supplied to the sample to maintain the detected voltage constant, and the sample is preheated while the particles being substantially kept in a stationary state by applying an alternating voltage prior to the application of the stationary voltage, to thereby obtain the mobility of the charged particle in the sample at high accuracy.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: February 21, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Kawai, Kiyoshi Kitagawa
  • Vinyl chloride resin composition
    Patent number: 4431772
    Abstract: A latex of a highly crosslinked butadiene rubber polymer comprising not less than 50% of butadiene, 1.0 to 10% of a crosslinking agent and a remainder of an ethylenically unsaturated monomer copolymerizable with butadiene, and having a particle size of 600 to 3,000 .ANG. and a degree of swelling of not greater than 7 is obtained by one or more stages of emulsion polymerization. By polymerizing 15 to 30 parts of a monomer mixture of an alkyl methacrylate, an aromatic vinyl monomer, and optionally a crosslinking agent and an unsaturated nitrile in the presence of 85 to 70 parts of the rubber polymer, a graft copolymer is obtained. A composition comprising 2 to 40% of this graft copolymer and 98 to 60% of a vinyl chloride resin possesses high impact resistance coupled with improved stress-whitening resistance, which properties cannot be easily obtained at the same time in conventional resin compositions.
    Type: Grant
    Filed: June 16, 1982
    Date of Patent: February 14, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takayuki Katto, Masanori Oota, Katsumi Suzuki, Yoshikatsu Satake
  • Electrooptical element
    Patent number: 4428873
    Abstract: An electrooptical solid element comprises a formed resin composition comprising a low molecular polar substance having a Kerr type electrooptical effect, and an organic polymer substance compatible with the low molecular polar substance. The formed resin composition is prepared by a method such as melt mixing on rollers, or dissolution in a common solvent followed by evaporation of the solvent. This formed resin composition is prepared in various shapes such as a polygon, a film, a prism and a polygonal pole. At least a pair of electrodes are provided on the surfaces of the formed resin composition, and further at least one of the electrodes may can be made of a transparent material.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: January 31, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Naohiro Murayama, Teruo Sakagami, Masuhiro Shoji
  • Heat-shrinkable laminate film
    Patent number: 4424243
    Abstract: A heat-shrinkable multilayer laminate film possessing excellent heat resistance, oil resistance and gas-barrier properties is obtained by interposing one intermediate layer of a thermoplastic resin having a crystalline melting point of from 70.degree. to 100.degree. C. between a core layer of a vinylidene chloride copolymer and outer surface layers of an ethylene/.alpha.-olefin copolymer having a crystalline melting point of not lower than 110.degree. C. or a mixture of this ethylene/.alpha.-olefin copolymer and an .alpha.-olefin polymer having a crystalline melting point of from 80.degree. to 100.degree. C. The thus obtained laminate film can be in sheet or tubular form, and is suitable for use in packaging by heat shrinkage raw meat, processed meat, cheese and other fat-containing food.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: January 3, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiharu Nishimoto, Kengo Yamazaki
  • Process for producing phenyl-[3,3,3-trifluoropropyl)phenyl]methane
    Patent number: 4423259
    Abstract: Novel trifluoropropyl-substituted aryl- or aralkylbenzene of the formula: ##STR1## wherein R is a not-substituted or ring-substituted phenyl-, benzyl-, phenethyl- or alpha-methylbenzyl group by one 3,3,3-trifluoropropyl group, and n is an integer of 1,2 or 3, provided that the total number of 3,3,3-trifluoropropyl group of the above-mentioned trifluoropropyl-substituted aryl- or aralkylbenzene is at most 3, and a process for producing thereof are disclosed.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: December 27, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiro Kobayashi, Itsumaro Kumadaki, Masaaki Takahashi, Takashi Yamauchi
  • Collagen fibers for use in medical treatments
    Patent number: 4420339
    Abstract: Disclosed herein are collagen fibers for use in medical treatments, having amino acid residues of 312 to 340 glycine residues, 119 to 138 proline residues, 94 to 100 hydroxyproline residues and 2.6 to 5.5 tyrosin residues per 1000 total amino acid residues thereof, a denaturation temperature in a range of 31.degree. to 40.degree. C., and S-constant of 1.12 to 1.62.
    Type: Grant
    Filed: March 18, 1982
    Date of Patent: December 13, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Tadaaki Kato
  • Method for producing spherical particles of carbon and of activated carbon
    Patent number: 4420443
    Abstract: A method for producing spherical particles of carbon and of activated carbon is described, in which a mixture of a pitch and a viscosity-reducing agent is melt-extruded into a form of string-like bodies, the thus obtained string-like bodies are broken into stick-like bodies of a length to diameter ratio of 1 to 5 and the stick-like bodies are thermally deformed utilizing hot water as a thermal medium into spherical particles. The spherical particles are then subjected to conventional extraction to remove the viscosity-reducing agent therefrom, and the thus obtained spherical particles of pitch are converted into spherical particles of carbon or of activated carbon.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: December 13, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hisatsugu Kaji, Kazuhiro Watanabe
  • Automatic continuous vacuum packaging method and apparatus
    Patent number: 4419854
    Abstract: A vacuum packaging method and apparatus for packaging solid objects such as food products of various shapes automatically. A web of tubular plastic film is supplied from a roll and drawn over an opening core which opens the plastic film into a rectangular shape. The film is then drawn over the object to be packaged and cut to a predetermined length. In one embodiment, the front end of the film is then sealed and the object urged towards the sealed end. In another embodiment, both ends of the film are left open at this point. The object with the film positioned therearound is transferred to a vacuum chamber. Prior to the chamber being evacuated, tension is applied to the film so as to prevent the formation of creases.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: December 13, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shingo Okada, Yuji Sawa, Kuniomi Adachi
  • Filling composition for use in liquid chromatography
    Patent number: 4416784
    Abstract: Disclosed herein is a bead-like substance comprising a hydroxymethylated copolymer of styrene and divinylbenzene having a serum protein adsorbed or adhering thereonto, suitable for filling the column used in liquid chromatography in the field of analysis, particularly in clinical examinations, and a method for analytically examining a physiological specimen by liquid column chromatography.
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: November 22, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masaaki Nakao, Fumio Kodama
  • Cyanoethylated olefin-vinyl alcohol copolymer and dielectric material and adhesive comprising the same
    Patent number: 4413090
    Abstract: A cyanoethylated resin to which adhesive properties and high dielectric constant are imparted by cyanoethylating a C.sub.2 -C.sub.4 olefin-vinyl alcohol copolymer, which is suitable for use as a dielectric material and an adhesive.
    Type: Grant
    Filed: April 6, 1982
    Date of Patent: November 1, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masuhiro Shoji, Teruo Sakagami, Naohiro Murayama
  • Vinylidene fluoride resin-based shaped product
    Patent number: 4413095
    Abstract: A vinylidene fluoride resin composition is obtained by mixing into a vinylidene fluoride resin a copolymer of a monomer (A) having the formula: ##STR1## wherein R.sub.1 is H or CH.sub.3, and X.sub.1 and X.sub.2 are each a saturated hydrocarbon group containing from 1 to 4 carbon atoms, H or halogen, and a monomer (B) having the formula: ##STR2## wherein R.sub.2 is H or CH.sub.3 and R.sub.3 is a saturated hydrocarbon group containing from 1 to 5 carbon atoms. Shaped products, particularly films obtained from this composition exhibit excellent ultraviolet shielding off effect and excellent transparency.
    Type: Grant
    Filed: November 17, 1982
    Date of Patent: November 1, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Toshiya Mizuno, Naohiro Murayama
  • Ultrasonic holography imaging device having a macromolecular piezoelectric element transducer
    Patent number: 4412147
    Abstract: An ultrasonic image device such as may be used in a holography system or scanning system and having a piezoelectric transducer in which the conversion efficiency and phase are substantially constant over a wide frequency range. A piezoelectric sheet 5 .mu.m to 1000 .mu.m thick is used for a piezoelectric element. The piezoelectric sheet is constructed of a macromolecular material including polymers and copolymers of polar monomers. A high frequency signal input device applies to the electrodes coupled to the piezoelectric sheet high frequency signals of different frequencies in a range around a fundamental resonance of the piezoelectric sheet of .+-.10 to .+-.70% of the fundamental resonance frequency.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: October 25, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masato Nagura, Kazushige Kikuchi, Hiroshi Obara, Yasushi Endo