Patents Assigned to Mitsui
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Patent number: 5735470Abstract: An irrigation hose provides a long life expectancy. The irrigation hose is characterized in that a plurality of flow passages are defined by partitions dividing the inside of the hose which is made of thermoplastic resin; and that each flow passage is provided with irrigation holes formed in a member of the tube portion which is in contact with outside air, that is the outer wall thereof. The irrigation hose can provide different irrigation methods appropriate to the crops or growth stages with just one hose, without exchanging or laying multiple hoses with different irrigation methods. A film 16 is inserted between a film 12 which is made of long thermoplastic resin film with irrigation holes formed throughout at regular pitch and another film 12 which is also made of a long thermoplastic resin film with irrigation holes on both sides.Type: GrantFiled: July 17, 1997Date of Patent: April 7, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tatsuya Ohe, Toshihisa Hori
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Patent number: 5733561Abstract: An aqueous suspension-type microcapsule insecticide composition which is obtained by emulsifying a hydrophobic admixture of liquid pyrethroid insecticide or a pyrethroid insecticide and a high boiling point solvent, preferably an alkyl ester of phthalic acid in which the alkyl group has 8-13 carbon atoms to form particles of a suitable size in the presence of an anionic water-soluble polymeric surface active agent and polycondensating melamine-formaldehyde or a derivative thereof on the surface of the said emulsified and dispersed particles, and a process for producing the composition. This composition exhibits stable insecticidal activity over a prolonged period with noticeably reduced toxicity to aquatic life.Type: GrantFiled: December 16, 1994Date of Patent: March 31, 1998Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Yoshinobu Shimura, Tamotsu Asano, Seiichi Shimono, Takeshi Imakita, Yukio Kiritani, Yuuji Enomoto, Toshio Matsumoto
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Patent number: 5733471Abstract: The present invention provides magnetite particles having a particle shape of an octahedron, a specific surface area of 5 m.sup.2 /g or more as determined by the BET method and. a coercive force of 40 to 100 Oe, or a particle shape of a hexahedron, a specific surface area of 6 m.sup.Type: GrantFiled: June 25, 1996Date of Patent: March 31, 1998Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Masachika Hashiuchi, Katsuhiko Yoshimaru, Tadashi Yamanishi
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Patent number: 5733983Abstract: A heat-resistant rubber composition of the invention is a vulcanizable composition comprising a specific ethylene-.alpha.-olefin-nonconjugated polyene copolymer rubber (A) and an organic peroxide (B). This heat-resistant composition has high crosslinking efficiency given by the organic peroxide and high modulus, and can provide a vulcanized rubber molded product of excellent resistance to environmental deterioration such as thermal aging resistance. The other heat-resistant rubber composition of the invention is a vulcanizable composition comprising 100 parts by weight of a specific ethylene-.alpha.-olefin-nonconjugated polyene copolymer rubber (A) composed of ethylene, an .alpha.-olefin or 3 to 20 carbon atoms and a nonconjugated polyene which is a vinyl end group-containing norbornene compound, 0.2 to 5 parts by weight of an amine type anti-aging agent (C) and/or a hindered phenol type anti-aging agent (D), 1 to 10 parts by weight of a sulfur type anti-aging agent (E) and an organic peroxide (B).Type: GrantFiled: December 10, 1996Date of Patent: March 31, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takashi Hakuta, Tetsuo Tojo, Masaaki Kawasaki, Mikio Hosoya
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Patent number: 5732988Abstract: A vehicle door latch device enclosed entirely within a vehicle door comprises a latch unit having a fork member which engages with a striker fixed to a vehicle body and a pawl which engages with the fork member for preventing the fork member from reversing, a power unit for turning the fork member from a half-latch position to a full-latch position, and a cable for transmitting power of the power unit to the fork member. The cable has a middle portion provided in vicinity of a bottom edge of the door, a first end portion which is provided in proximity of a rear edge of the door in such a manner as to extend nearly vertically, and a second end portion which extends almost parallel with the first end portion and is connected to the power unit.Type: GrantFiled: December 6, 1996Date of Patent: March 31, 1998Assignee: Mitsui Kinzoku Kogyo Kabushiki KaishaInventor: Tetsuro Mizuki
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Patent number: 5731393Abstract: An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches and a high swell ratio and a process for preparing the polymer are disclosed. A solid titanium catalyst component obtained by initially contacting a solid titanium composite containing titanium, magnesium, halogen and a compound having at least two ether linkages present through plural atoms with an organometallic compound and then contacting the resulting product with oxygen is further disclosed. An ethylene polymerization catalyst comprising the above catalyst component and an organometallic compound catalyst component is furthermore disclosed. The ethylene polymer is excellent in moldability, and from this polymer, a molded article which is excellent in rigidity and impact resistance and free from poor appearance can be obtained. By the use of the ethylene polymerization catalyst, an ethylene polymer having excellent properties as mentioned above can be obtained.Type: GrantFiled: April 9, 1997Date of Patent: March 24, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shin-ichi Kojoh, Mamoru Kioka
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Patent number: 5730977Abstract: The present invention provides an anti-VEGF human monoclonal antibody capable of binding to human VEGF to neutralize its activity, a cell strain producing said human monoclonal antibody, and a vascularization inhibitor containing said human monoclonal antibody. Hybridoma strains VA01 and BL2 producing the anti-VEGF human monoclonal antibody can also be provided according to the present invention by transformation with Epstein-Barr Virus (EBV) of human lymphocyte producing anti-human VEGF antibody and then fusing the transformant cells with human myeloma cells. The monoclonal antibody of the present invention can serve as a vascularization inhibitor which is useful for human because it is derived from human and capable of binding specifically to VEGF participating in vascularization, to inhibit the migration or proliferation of vascular endothelial cells.Type: GrantFiled: August 15, 1996Date of Patent: March 24, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hisayoshi Ooka, Shiro Takagi, Izumi Mita, Noboru Satozawa, Ayako Watanabe, Tomoko Yokomatsu
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Patent number: 5728790Abstract: The present invention relates to a thermosetting powder paint comprising, as essential components, (A) a copolymer of particular composition composed of a glycidyl group-containing monomer, styrene and other monomer copolymerizable therewith and, as curing agents capable of reacting with the component (A) to crosslink the component (A), (B) an aliphatic polycarboxylic acid and (C) a linear anhydride of an aliphatic polycarboxylic acid; a coating method using the above thermosetting powder paint; and a coated article obtained by using the above thermosetting powder paint. The above thermosetting powder paint, when used as a paint for automobile, has excellent storage stability and gives a coating film having excellent appearance, properties, weathering resistance and yellowing resistance; therefore, the paint can be favorably used particularly as an top coat and an intermediate coat for automobile and its parts.Type: GrantFiled: August 3, 1995Date of Patent: March 17, 1998Assignee: Mitsui Toatsu Chemicals, IncInventors: Masashi Seki, Eiichi Kawasaki, Takayoshi Sekido, Mitsuyuki Mizoguchi, Takahisa Miyawaki, Kousuke Suewaka
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Patent number: 5728775Abstract: A heat-resistant high-nitrile polymer composition obtained by the graft copolymerization of 100 parts by weight of a monomer mixture comprising 50 to 80% by weight of an unsaturated nitrile monomer, a maleimide monomer, an aromatic vinyl monomer, and a monomer copolymerizable with the foregoing monomers, in the presence of 1 to 40 parts by weight of a conjugated diene-based synthetic rubber containing not less than 50% by weight of a conjugated diene monomer unit, wherein the concentration of residual maleimide monomer in the polymer composition is not greater than 200 ppm by weight. This polymer composition is suitable for use as a molding material for extrusion molding, blow molding, injection molding and the like, and is useful in applications which require gas barrier properties, chemical resistance, non-adsorptive properties and the like, and which require use in automobiles, heat resistance sufficient for heat filling, and safety and hygienic properties.Type: GrantFiled: December 3, 1996Date of Patent: March 17, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hiroaki Narisawa, Masahiro Kaneko, Mitsuo Kawata, Syuichi Yamaguchi, Shinichi Asai, Makoto Someda
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Patent number: 5728509Abstract: At least one convex (or concave) arcuate face is formed by photolithography on a photoresist film formed on a surface of an optical device made of an optical material. The surface of the optical device and the photoresist film are etched to form, on the surface of the optical device, at least one convex (or concave) arcuate face similar to the convex (or concave) arcuate face formed on the photoresist film. After the surface of the optical material is mirror face polished, a photoresist film is formed on the polished surface, and the polished surface and the photoresist film are etched uniformly. An optical device obtained in this manner is used for a laser oscillator, a monolithic laser system, a nonlinear optical device, a microlens, a ring laser and so forth. Further, a plurality of reflecting portions are provided on a pair of opposing surfaces of a light transmitting optical material. At least one of the opposing surfaces is formed on the convex arcuate face.Type: GrantFiled: June 6, 1995Date of Patent: March 17, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akira Eda, Kiyofumi Muro
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Patent number: 5727684Abstract: An apparatus and associated method which detects breaks and irregularities in a sealing arrangement, especially in heat-sealed, sterile packages by providing a standardized verification bar on the package adjacent a color coded sealing area. The verification bar may indicate examples of a proper seal, an underseal, and an overseal, as well as common seal problems such as bubbles, hairline voids and regular coextensive voids. The package which is especially useful as a sterilization pouch can be visually inspected both by the user of the package contents just prior to use and by the vendor of articles in the packages post assembly of the article into the sealed and sterilized package.Type: GrantFiled: August 28, 1996Date of Patent: March 17, 1998Assignee: Mitsui Plastics CompanyInventors: Nicholas J. Webb, Hiro Hayashi
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Patent number: 5728780Abstract: In a novel method of homo- or copolymerization of vinyl chloride, a specified coating agent is applied on the surfaces of the portions which will become into contact with the vinyl chloride monomer during the polymerization process. The coating agent is in a form of an aqueous solution of a modified condensation product of phenol and aldehyde, the pH of the solution being adjusted in a range that the product is dissolved at an ambient temperature upon coating of the solution and separates out of the solution upon being heated on the surfaces. The wall surface of the polymerization tank and the like is then coated with a thin film of the coating agent having a uniform thickness and being strongly adhered to the wall surface, thereby providing an excellent effect of preventing adhesion of the product polymer to the wall surface.Type: GrantFiled: June 6, 1995Date of Patent: March 17, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Seiichi Masuko, Ichisaburo Nakamura, Yasuyuki Hatakeyama
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Patent number: 5728744Abstract: Disclouse is an olefin thermoplastic elastomer foamed product obtained by heating a foamable composition comprising a partially crosslinked thermoplastic elastomer composition (A), a specific olefin plastic (B) and a foaming agent (C) in specific proportions. The partially crosslinked thermoplastic elastomer (A) is obtained by dynamically heat-treating a mixture in the presence of organic peroxide, said mixture comprising specific proportions of a peroxide-crosslinkable copolymer rubber (a), which is a specific ethylene/.alpha.-olefin/nonconjugated diene copolymer rubber, and a peroxide-decomposable olefin plastic (b), which is a (co)polymer containing 50 to 100% by mol of an .alpha.-olefin of 3 to 20 carbon atoms and has a specific MFR. The olefin plastic (B) is a (co)polymer containing 50 to 100% by mol of an .alpha.-olefin of 2 to 20 carbon atoms and has a specific MFR. Also disclosed is a process for preparing the olefin thermoplastic elastomer foamed product.Type: GrantFiled: November 21, 1996Date of Patent: March 17, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Keiji Okada, Masato Karaiwa, Akira Uchiyama
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Patent number: 5728642Abstract: There is provided with a method of treating an exhaust gas comprising the steps of loading into a column an exhaust gas treating agent containing as a main component a metal of which surface is fluorinated previously; passing through the column the exhaust gas containing nitrogen trifluoride as a component to be treated; and contacting the exhaust gas with the exhaust gas treating agent. And the exhaust gas treating agent is also provided.Type: GrantFiled: February 3, 1995Date of Patent: March 17, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Makoto Aritsuka, Sadaichi Komohara, Isao Harada
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Patent number: 5725798Abstract: There is provided a carboxylic acid compound represented by the following formulae (I) to (IV): ##STR1## a liquid crystal material consisting of the carboxylic acid ester compound, a liquid crystal composition comprising the carboxylic acid ester compound, and a liquid crystal element using the carboxylic acid ester compound. There can be obtained advantages such as low operating temperature, high speed switching, very small electric power consumption, and high-stable contrast.Type: GrantFiled: May 8, 1995Date of Patent: March 10, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yuuichirou Tatsuki, Shinichi Nishiyama, Junichi Kawabata, Tooru Yamanaka, Chiho Tanaka
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Patent number: 5725940Abstract: A composite molded article which is produced by joining multilayer boards composed of fiber-reinforced thermoplastic resin onto the surface of a core material made of a foamed resin, and its production method.The composite molded article is constituted by a core material which is composed of a foamed resin molded into a desired shape, and the multilayer boards which are produced such that a plurality of prepregs containing reinforcement fiber by a volume content of not less than 30% and not more than 85% are laminated with the direction of the reinforcement fiber being different with respect to each other, and are heated to not less than a melting temperature of a thermoplastic resin contained therein so as to mutually glue the prepregs, and to remove air contained inside.Type: GrantFiled: October 27, 1993Date of Patent: March 10, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hideo Sakai, Kojiro Motai, Satoru Kishi, Katsuyuki Morita, Nobuyuki Hosoyama, Hiroshi Tanabe, Shuji Iida, Kiyotaka Nakai
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Patent number: 5726262Abstract: A solid titanium catalyst component ?Ia! containing magnesium, halogen, titanium and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a catalyst and a prepolymerized olefin-containing catalyst prepared by using the solid titanium catalyst component ?Ia!; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catayst is used. A catalyst and a prepolymerized olefin containing catalyst prepared by using a solid titanium catalyst component ?Ib! containing magnesium, halogen, titanium and a specific electron donor (a1), and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catayst is used.Type: GrantFiled: December 24, 1996Date of Patent: March 10, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Mamoru Kioka, Tetsunori Shinozaki
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Patent number: 5725715Abstract: A squeezable tubular container (a) which is formed from a composition containing a polyethylene having a density of 0.900 to 0.975 g/cm.sup.3 and an ethylene/.alpha.-olefin copolymer having a density smaller than 0.900 g/cm.sup.3, (b) has a crosslinking caused under irradiation with electron beam, and (c) is sterilizable at a high temperature or is heat-sealable or ultrasonically sealable; and a process for the production thereof.Type: GrantFiled: July 2, 1996Date of Patent: March 10, 1998Assignees: Mitsui Petrochemical Industries, Ltd,, Yoshino Kogyosho Co., Ltd., Japan Atomic Energy Research InstituteInventors: Keizo Makuuchi, Fumio Yoshii, Yasuo Futami, Masanobu Ishiyama, Gen Miyamoto, Hideo Kushida, Sei Nakajima, Takahiro Kurihara, Ryoji Sugawara, Hideshi Kawachi, Mikio Nakagawa
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Patent number: 5723640Abstract: The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. An olefin polymerization catalyst component of the present invention comprises the aforementioned transition metal compound.Type: GrantFiled: March 26, 1996Date of Patent: March 3, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Junichi Imuta, Terunori Fujita, Masatoshi Nitabaru, Masayasu Yoshida
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Patent number: 5724115Abstract: Disclosed is a liquid crystal device comprising a liquid crystal cell filled with a liquid crystal material capable of exhibiting a smectic phase, said cell including upper and lower substrates each having in order an electrode and an orientation film in contact with the liquid crystal material, a cross angle .THETA. formed by the orientation treatment directions of the orientation films is 180.degree.-.delta. or 360.degree.-.delta. (0.degree.<.delta..ltoreq.90.degree.). Also disclosed is a process for preparing the above-mentioned liquid crystal device comprising treating the orientation films and preparing the liquid crystal cell so as to have the orientation treatment directions of the orientation films form the cross angle .THETA. within the above range in the cell.Type: GrantFiled: June 2, 1995Date of Patent: March 3, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yukari Sakai, Mitsuko Nagai, Hideo Hama