Patents by Inventor Hideharu Sasaki
Hideharu Sasaki 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).
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Patent number: 5728699Abstract: The present invention presents a benzylsulfide derivative of the formula (I) or its salt: ##STR1## wherein R.sup.1 is a C.sub.1-6 alkyl group, a C.sub.1-6 haloalkyl group, a C.sub.2-4 alkenyl group, a cyano group, etc., and each of R.sup.2 and R.sup.3 is a hydrogen atom, a halogen atom, a cyano group, a C.sub.1-4 alkyl group, a C.sub.1-3 haloalkyl group, etc., R.sup.4 is a hydrogen atom, a halogen atom, a C.sub.1-4 alkyl group, etc., A is a hydrazinoaralkyl group or hydrazonoaralkyl group, and n is 0, 1 or 2; a process for its production; and a pesticide containing such a benzylsulfide derivative as an active ingredient. The benzylsulfide derivative of the present invention is capable of controlling various pests without adversely affecting crop plants.Type: GrantFiled: December 19, 1996Date of Patent: March 17, 1998Assignees: Kumiai Chemical Industry Co., Ltd., Ihara Chemical Industry Co., Ltd.Inventors: Keiji Toriyabe, Hideharu Sasaki, Naoshi Masuyama, Akihide Nagai, Hiroyuki Yano, Mieko Kawashima, Yutaka Kurihara, Tomonori Shimazu
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Patent number: 4948574Abstract: A method of manufacture of pitch-based carbon fiber by infusibilization of pitch fiber followed by carbonization, comprising doping the pitch fiber with at least 0.05 percent by weight of iodine, heating under an oxidizing atmosphere for infusibilization, and then heating under an inert atmosphere for carbonization, whereby it is carbonized or graphitized.Type: GrantFiled: May 8, 1989Date of Patent: August 14, 1990Assignee: Teijin LimitedInventors: Hideharu Sasaki, Toru Sawaki
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Patent number: 4840762Abstract: A process for the preparation of high-performance grade carbon fibers, which comprises attaching a fine powder of at least one member selected from oxides and carbides of silicon, aluminum, titanium, and boron to a precursor fiber bundle of as spun pitch fibers, subjecting the fiber bundle to an infusibilization treatment, and subjecting the fiber bundle to a carbonization treatment.Type: GrantFiled: October 22, 1985Date of Patent: June 20, 1989Assignee: Teijin Ltd.Inventors: Toru Sawaki, Hideharu Sasaki, Tsutomu Nakamura, Jiro Sadanobu
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Patent number: 4628001Abstract: A pitch-based carbon or graphite fiber having a leafy lamella arrangement in at least 30% of the fiber cross-sectional area and having a tensile strength of at least 300 kg/mm.sup.2. The fiber is prepared by melt-spinning an optically anisotropic pitch having an optically anisotropic phase content of at least 50% through a spinneret in which at least one central line distance in a spinning hole simultaneously satisfies the following requirements I and II,Ln<10 I1.5.ltoreq.Ln/Wn.ltoreq.20 IIwherein Ln stands for central line distances in mm in the spinning hole and Wn stands for wetted perimeter widths in mm in the spinning hole, and infusibilizing and carbonizing the formed pitch fiber.Type: GrantFiled: April 3, 1985Date of Patent: December 9, 1986Assignee: Teijin LimitedInventors: Hideharu Sasaki, Toru Sawaki, Yoshiaki Yoshioka
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Patent number: 4590055Abstract: The invention provides carbon fibers having mechanical properties equival to or even better than those of the polyacrylonitrile-based carbon fibers from a bituminous material, e.g. coal tar pitch, as the starting material. The starting pitch is first partially hydrogenated in tetrahydroquinoline under specific conditions followed by a heat treatment to give a pitch composition suitable for spinning which can be characterized by several parameters including the proportions of the carbons and hydrogens having different chemical shifts in the NMR analysis. The pitch composition for spinning is then subjected to spinning under specific conditions including the temperature condition for controlling the viscosity behavior of the molten pitch composition determined by use of the Andrade's equation and the pitch filament is then infusibilized in an oxidative atmosphere and carbonized in an inert atmosphere into carbon fibers having a tensile strength of at least 200 kg/mm.sup.Type: GrantFiled: August 23, 1983Date of Patent: May 20, 1986Assignee: Director-General of the Agency of Industrial Science and TechnologyInventors: Yasuhiro Yamada, Takeshi Imamura, Hidemasa Honda, Toru Sawaki, Hideharu Sasaki
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Patent number: 4507467Abstract: High modulus shaped articles such as fibers and films, composed of a wholly aromatic copolyamide, are provided. The wholly aromatic copolyamide is comprised of recurring units of the formulae:--NH--AR.sub.1 --NH--CO--Ar.sub.2 --CO-- (A)and--NH--Ar.sub.3 --CO-- (B)wherein Ar.sub.1, Ar.sub.2 and Ar.sub.3 independently stand for divalent groups selected from ##STR1## in which X's independently stand for a group selected from halogeno, alkyl, aralkyl, aromatic, alkoxy, acetyl and cyano, n is 1 to 3 and Y is selected from ##STR2## in which R' stands for an 1-5C alkyl group, and the copolymerization ratio expressed by the molar ratio of the total of Ar.sub.1, Ar.sub.2 and Ar.sub.3 fails within the square hatched region in a triangular coordinate of FIG. 1, and said copolyamide has an intrinsic viscosity of at least 1.5.Type: GrantFiled: August 29, 1983Date of Patent: March 26, 1985Assignee: Teijin LimitedInventors: Keizo Shimada, Hideharu Sasaki, Hiroshi Mera, Toru Sawaki, Akihiro Aoki
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Patent number: 4498957Abstract: An aromatic polyamide paper-like sheet having excellent heat- and chemical- resistances and electric insulating properties, comprises an artificial pulp ingredient comprising a number of amorphous pulp particles consisting of an aromatic polyamide material, and a fiber ingredient consisting of a number of short fibers bonded to each other with the amorphous pulp particles, the ratio in weight of the artificial pulp ingredient to the fiber ingredient being in a range of from 1:9 to 9:1 and the aromatic polyamide molecules contained at least in the amorphous pulp particles being cross-linked with a cross-linking agent.Type: GrantFiled: September 15, 1983Date of Patent: February 12, 1985Assignee: Teijin LimitedInventors: Hideharu Sasaki, Keizo Shimada
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Patent number: 4482603Abstract: A wholly aromatic polyamide fiber non-woven sheet having satisfactory density, impregnating property, heat resistance, and surface evenness, comprises mutually, randomly entangled fibers consisting essentially of a wholly aromatic polyamide having 85 molar % or more of at least one type of recurring units selected from those of the formulae (I) and (II): ##STR1## The non-woven sheet is characterized in that the wholly aromatic polyamide fibers have portions thereof having a flattened cross-sectional profile; the aromatic polyamide fibers are fuse-bonded to each other at least at portions thereof intersecting each other; and the sheet includes pores connected to each other, and having a size at the peak of pore size distribution, of 13 microns or less determined by means of a mercury porosimeter, and no voids isolated from each other, and has a porosity of from 5% to 40% and an air permeability rate of from 0.1 to 10,000 sec/100 ml.Type: GrantFiled: April 18, 1983Date of Patent: November 13, 1984Assignee: Teijin LimitedInventors: Tsugushi Yoshida, Hideharu Sasaki, Toru Sawaki, Keizo Shimada
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Patent number: 4398995Abstract: A papery product consisting essentially of a fibrous web, at least part of said web being made of a wholly aromatic polyamide fiber having a readily soluble skin layer and a sparingly soluble or insoluble core layer, and pressure and heat being applied to said web. Said product is excellent in its mechanical and heat-resisting properties.Type: GrantFiled: May 20, 1981Date of Patent: August 16, 1983Assignee: Teijin LimitedInventors: Hideharu Sasaki, Tsutomu Nakamura, Keizo Shimada, Yuzo Aito, Yutaka Tabe
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Patent number: 4337155Abstract: A wholly aromatic polyamide fiber material having an excellent resistance to chemicals, comprises wholly aromatic polyamide fibers each covered with a coating of a fluorine-containing polymeric resin which coating has been derived from an aqueous emulsion of the fluorine-containing polymer resin.Type: GrantFiled: January 14, 1981Date of Patent: June 29, 1982Assignee: Teijin LimitedInventors: Hideharu Sasaki, Yorikazu Tamura, Keizo Shimada