Patents Assigned to Nippon Kayaku Kabushiki
  • Composition adaptable or suitable for being marked and molding thereof
    Patent number: 5792807
    Abstract: The present invention relates to a marking composition capable of developing a vivid white color upon the application of laser beams, which composition comprises a polyolefin resin having no fluidity at a temperature of 50.degree. C. and at least one inorganic material selected from talc, calcium carbonate and aluminum hydroxide, wherein the inorganic material is blended in a ratio of 1-300 w/w % based upon the polyolefin resin. The invention also provides the resin moldings obtained by molding the marking compositions.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: August 11, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Shoiti Hayashihara, Masaru Kudho, Masaki Shinmoto, Chie Umeyama
  • Pharmaceutical use of forskolin derivatives
    Patent number: 5789439
    Abstract: The present invention relates to novel pharmaceutical use of forskolin derivatives represented by the general formula: ##STR1## wherein R.sup.1, R.sup.2 and Ac are as defined later ##STR2## (wherein R.sup.3 and R.sup.4 are each hydrogen or lower alkyl group, or R.sup.3 and R.sup.4 may be combined to represent lower alkylene group which may have oxygen or nitrogen atom in the linking chain, and n is an integer of 1 to 5); R.sup.2 represents hydrocarbon group having 2 to 3 carbon atoms; and Ac represents acetyl group.The above-mentioned forskolin derivative or a physiologically acceptable salt thereof can be used as a platelet aggregation inhibiting or controlling agent, spasmolytic agent, therapeutic agent for skin ulcer, peripheral circulation improving agent for limbs and differentiation inducing and promoting agent.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: August 4, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Makoto Hosono, Akira Fujita, Giichi Izumi, Tochiro Tatee, Takashi Takahira, Yasuhiko Furuta, Michiko Sakai, Osamu Ishizuka, Takashi Terada, Junpei Itoh
  • Naphthalene ring-containing resins, resin compositions and cured products thereof
    Patent number: 5780571
    Abstract: This invention provides resins and resin compositions which afford cured products with high heat resistance, low water absorption and high adhesion which are useful as electric and electronic materials. Resins obtained by condensation reaction between 4,4'-di(.omega.-substituted methyl)biphenyl or the like and naphthols; epoxy resins obtained by glycidyleterifying said resins; epoxy resin compositions containing these resins; and cured products thereof are disclosed.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: July 14, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Hiroaki Ohno, Hiromi Morita, Shigeru Moteki, Yasumasa Akatsuka
  • Spontaneously-firing explosive composition
    Patent number: 5756928
    Abstract: A gas generator for an air bag is provided which contains a spontaneously-firing explosive composition in which at least one of a squib, igniting agent and a gas generant is contained in a casing formed of a light alloy material, the spontaneously-firing explosive composition containing carbohydrates, oxohalogenates and metal oxides or alternatively carbohydrates, oxohalogenates, metal oxides and one or more synthetic resins. The spontaneously-firing explosive composition has a spontaneous firing property in temperature range of either 165.degree.-220.degree. C. or 165.degree.-200.degree. C. The effective temperature range may be selected as needed.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: May 26, 1998
    Assignees: Sensor Technology Co., Ltd., Nippon Kayaku Kabushiki-Kaisha
    Inventors: Yuji Ito, Ayumu Kimura, Masaharu Murakami, Eishi Sato, Michihisa Taguchi
  • Process for preparing benzo?c!phenanthridinium derivatives, novel compounds prepared by said process, and antitumor agents
    Patent number: 5747502
    Abstract: The present invention relates to benzo?c!phenanthridinium derivative of the general formula A: ##STR1## wherein M and N individually represent a hydroxyl or lower alkoxy group, or M and N simultaneously represent a hydrogen atom or together form a methylenedioxy group, X.sup.- represents an acid residue or a hydrogen acid residue, and R represents a lower alkyl group, and a process for preparing such derivatives. The compounds exhibit both potent antitumor activity and platelet aggregation inhibition activity, and are expected to be useful for the treatment of tumors. The process has good reproducibility and may be effected under moderate conditions, and therefore the process is practically useful. In addition, hydrogen salts of the present compounds have an enhanced stability, which is an advantage in formulating the same into pharmaceutical preparations.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: May 5, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Miyoji Hanaoka, Hisao Ekimoto, Fumiko Kobayashi, Yukio Irie, Katsutoshi Takahashi, Masanobu Suzuki, Takeshi Nakanishi, Osamu Kogawa, Keizou Ishikawa
  • Process for producing dioxazine compounds, colored materials therewith and dioxazine compounds having a plate-like crystal form
    Patent number: 5734050
    Abstract: The present invention relates to a process for producing a dioxazine compound represented by the formula (1) which comprises carrying out a ring closure reaction of a compound represented by the formula (2) in the presence of a dioxazine derivative of the formula (3): ##STR1##
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: March 31, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Masaaki Ikeda, Junko Yoshioka, Masao Onishi
  • Solidifying material for radioactive wastes, process for solidifying radioactive wastes and solidified product
    Patent number: 5732363
    Abstract: There are provided a solidifying material used for radioactive waste which comprises a latent hydraulic material, an ultra-fine powder substance and a dispersing agent, and a process for the solidification of radioactive wastes which comprises kneading the above solidifying material with a cure stimulating agent, radioactive waste and, as occasion demands, water, and then curing the mixture by aging. Since the solidifying material of the present invention has excellent properties such as large treating capacity, excellent water resistance and large compressive strength, not only temporary storage but also permanent storage of radioactive wastes can be made.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: March 24, 1998
    Assignees: JGC Corporation, Nippon Kayaku Kabushiki Kaisha
    Inventors: Kazunori Suzuki, Shigeru Mihara, Takuro Yagi, Yoshimitsu Karasawa, Koichi Ikeda, Yasuo Kuroda
  • Preparation of AN-DNT-Al explosive
    Patent number: 5728969
    Abstract: A granular explosive is obtained by mixing porous prill ammonium nitrate having an average particle size of 0.5 to 3.0 mm with a liquid aromatic dinitro compound and optionally a metal powder. Explosives having high sensitivity and power can be obtained by a simple and easy process.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: March 17, 1998
    Assignees: Mitsubishi Chemical Corporation, Nippon Kayaku Kabushiki Kaisha
    Inventors: Koichi Otani, Seiichi Yoshida, Yoshiyuki Ikeda, Hiroyuki Taniguchi
  • Process for regeneration of catalysts
    Patent number: 5716895
    Abstract: A simple and excellent process for the regeneration of heteropolyacid catalysts can be provided. A heteropolyacid catalyst, e.g. a phosphomolybdic acid catalyst, whose activity has been lowered can be regenerated by dissolving and/or suspending it in an aqueous medium and then treating with an inorganic ion-exchange material, e.g. crystalline antimonic acid.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: February 10, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Hideki Sugi, Kazuo Shiraishi, Atsushi Sudo
  • Polarizing element, polarizing plate, and process for production thereof
    Patent number: 5706131
    Abstract: A polarizing element or polarizing plate comprising a layer having photoactive molecules and a layer containing dichroic molecules formed in contact with said layer, which can easily be produced without a stretching procedure so as to have a complicated pattern, a curved surface or a large area; and a process for producing said polarizing element or polarizing plate which is characterized by irradiating a layer having photoactive molecules on a substrate with linear polarized light, and then forming a dichroic molecular layer on the irradiated layer.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: January 6, 1998
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Kunihiro Ichimura, Norio Ishizuki, Junji Toda
  • Photo-imaging resist ink and cured product thereof
    Patent number: 5702820
    Abstract: There is disclosed a photo-imaging resist ink containing (A) an unsaturated group-containing polycarboxylic acid resin which is a reaction product of (c) succinic anhydride with an additive reaction product of (a) an epoxy resin with (b) an unsaturated group-containing monocarboxylic acid, wherein (a) the epoxy resin is represented by the following formula (1): ##STR1## wherein M stands for ##STR2## n is at least 1 on the average; and m is 1 to n on the average. The resist ink is excellent in developability and photosensitivity, while the cured product thereof is excellent in flex resistance and folding resistance, and well satisfactory in adhesion, pencil hardness, solvent resistance, acid resistance, heat resistance, etc.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: December 30, 1997
    Assignees: Nippon Kayaku Kabushiki Kaisha, Nippon Polytech Corp.
    Inventors: Minoru Yokoshima, Tetsuo Ohkubo, Kazunori Sasahara, Yoneji Sato, Yoko Baba
  • Laser marking method and aqueous laser marking composition
    Patent number: 5691757
    Abstract: This invention relates to a laser marking method which comprises heating a base article having on its surface a thin film of a laser marking composition containing a color former and a color developer having a melting point of 200.degree. C. or above, and then applying laser light to the thin film. The method of this invention is capable of no-break marking with vivid color development by application of laser light, without causing discoloration of the ground even under a condition of 120.degree. C. or above.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: November 25, 1997
    Assignees: Nippon Kayaku Kabushiki Kaisha, Kansai Paint Kabushiki Kaisha
    Inventors: Shoiti Hayashihara, Masaki Shinmoto
  • Disperse dye composition and method for dyeing hydrophobic fiber material therewith
    Patent number: 5688288
    Abstract: A disperse dye composition comprising one or more dyes represented by the formula: ##STR1## wherein X represents a chlorine or bromine atom; Y a hydrogen atom or an alkoxy or alkoxyalkoxy group; and each of R.sub.1 and R.sub.2 independently a hydrogen atom, a linear or branched unsubstituted or substituted alkyl group, an allyl group or a cycloalkyl group, provided that each of the alkyl and alkoxy groups has 1 to 4 carbon atoms, anda dye represented by the formula: ##STR2## wherein Y represents an alkoxy or alkoxyalkoxy group; each of R.sub.1 and R.sub.2 independently a hydrogen atom, a linear or branched unsubstituted or substituted alkyl group, an allyl group or a cycloalkyl group, and R.sub.3 an alkyl group, provided that each of the alkyl and alkoxy groups has 1 to 4 carbon atoms.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: November 18, 1997
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Yoshiki Akatani, Yasuo Murakami, Hiroyuki Matsumoto, Kiyoko Tanaka
  • Granular ammonium nitrate explosive
    Patent number: 5675119
    Abstract: A granular explosive is obtained by mixing porous prill ammonium nitrate having an average particle size of 0.5 to 3.0 mm with a liquid aromatic dinitro compound and optionally a metal powder. Explosives having high sensitivity and power can be obtained by a simple and easy process.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: October 7, 1997
    Assignees: Mitsubishi Chemical Corporation, Nippon Kayaku Kabushiki Kaisha
    Inventors: Koichi Otani, Seiichi Yoshida, Yoshiyuki Ikeda, Hiroyuki Taniguchi
  • Process for preparation of 1-acyl-2-substituted hydrazines
    Patent number: 5672723
    Abstract: The present invention can provide a process for the preparation of an 1-acyl-2-substituted hydrazine compound from a mixture containing the 1-acyl-2-substituted hydrazine and an 1-acyl-1-substituted hydrazine by selective hydrolysis or alcoholysis of the 1-acyl-yl-1-substituted hydrazine in the presence of an acid catalyst, and by separation of the resulting carboxylic acid and derivative thereof.The 1-acyl-2-alkyl hydrazine obtained has a high purity.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: September 30, 1997
    Assignees: Nippon Kayaku Kabushiki Kaisha, Sankyo Company, Limited
    Inventors: Hiroki Hotta, Hiroyasu Sugizaki, Tetsuya Toya, Mikio Yanagi
  • Apparatus for actuating the safety devices for vehicle occupants
    Patent number: 5668528
    Abstract: An apparatus for actuating a plurality of safety devices equipped in a vehicle for protecting occupants from an impact of a collision has a plurality of squibs (4,5) connected in series with each other so as to form a series circuit (6) and ignited by a current flowing through and conformed to one and the same standard. A power source (3) supplies electrical energy to the series circuit (6), and a collision detector (7) allows a current to flow from the power source (3) to said series circuit (6) when detecting a collision. A required energy for igniting all of the squibs (4,5) is thus supplied before the series circuit (6) opens electrically at one squib.
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: September 16, 1997
    Assignees: Sensor Technology Co. Ltd., Nippon Kayaku Kabushiki-Kaisha
    Inventors: Shigetaka Kitao, Ayumu Kimura, Yasuhiko Ootani, Isamu Hitomi, Akihiko Kuroiwa
  • 14.alpha.-hydroxy-4-androstene-3,6,17-trione hydrate and process for producing same
    Patent number: 5648507
    Abstract: Provided are stable hydrate crystals of 14.alpha.-hydroxy-4-androstene-3,6,17-trione having a biological activity of human placenta-originating estrodiene synthesis enzyme inhibitory action. These hydrate crystals include two kinds of 14.alpha.-hydroxy-4-androstene-3,6,17-trione hydrate crystals having a diffraction pattern having characteristic peaks at diffraction angles in crystalline powder X-ray diffraction. Processes for producing these hydrate crystals are also provided.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: July 15, 1997
    Assignees: Nippon Kayaku Kabushiki Kaisha, Snow Brank Milk Products Co., Ltd.
    Inventors: Kazuo Ohtsuki, Akikazu Mitsunobu, Yoshihiro Imaizumi, Nobuyoshi Honda, Satoshi Inoue
  • Process for the preparation of etoposide phosphate and intermediate thereof
    Patent number: 5637680
    Abstract: An etoposide phosphate represented by the formula ##STR1## is prepared by blocking the hydroxyl groups of the saccharide moiety of etoposide with halogenoacetyl groups, thereafter phosphorylating the 4'-position, and removing the halogenoacetyl groups from the obtained phosphate in the presence of an amine. This process can give the objective etoposide phosphate in a higher yield than that of the prior art to enable the industrial mass-production thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 10, 1997
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Yoshinobu Miyazawa, Hitoshi Sato, Hiroshi Yoshikawa, Kouichi Ohkawa, Noriko Tomiyoshi
  • (Meth)acrylates, resin composition using the same and ultraviolet-curing resin composite for transmission type screens
    Patent number: 5629445
    Abstract: This invention relates to (meth)acrylates represented by formula (1): ##STR1## wherein, R.sub.1 and R.sub.2 are each independently H or CH.sub.3 and average value of n is 1-5; resin composite comprising (A) an urethane (meth)-acrylate and/or epoxy (meth)acrylate, (B) a (meth)-acrylate represented by formula (1) above, (C) an ethylenically unsaturated compound other than component (A) or (B), and (D) a photopolymerization initiator; and cured products of said resin composites. The cured products of said resin composites of this invention have high refractive index and are superior in mold release property, shape reproducibility, restorability, and scratch resistance and suited in particular for transmission type screens.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 13, 1997
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Kenji Nakayama, Katsunori Shimura, Minoru Yokoshima, Nobuo Taniguchi
  • Etoposide preparations
    Patent number: 5609882
    Abstract: This invention relates to an etoposide preparation containing an etoposide composition comprising an etoposide, polyvinylpyrrolidone, and water-soluble cellulose ether derivative wherein the proportion of the respective components is about 0.25 to 2 parts by weight for polyvinylpyrrolidone and about 0.0028 to 0.2 parts by weight for the water-soluble cellulose ether derivative per 1 part by weight of the etoposide, and about 10 to 20% (w/w) for the etoposide in the whole amount of the composition.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: March 11, 1997
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Minoru Aoki, Minoru Nakada, Yuichi Yazawa, Gen'ichi Izu, Takashi Terada