Patents by Inventor Fujio Masuko
Fujio Masuko 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: 4777309Abstract: A continuous process for producing 5-vinyl-2-norbornene, useful as the raw material of 5-ethylidene-2-norbornene used as a termonomer for EPDM, from a mixture of cyclopentadiene and butadiene or from a mixture of cyclopentadiene and dicyclopentadiene and butadiene by the Diels-Alder reaction which process comprises adding from 10 to 10,000 ppm of N,N-diethylhydroxylamine or 4-oxo-2,2,6,6-tetramethylpiperidine-1-oxyl relative to the total weight of cyclopentadiene and butadiene or of a mixture of cyclopentadiene and dicyclopentadiene and butadiene, continuously introducing the resulting mixture into a pressure reaction vessel, allowing them to react in the absence of any gas phase portion within the said pressure reaction vessel, and continuously withdrawing the reaction product.Type: GrantFiled: September 29, 1987Date of Patent: October 11, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuo Kimura, Masahiro Usui, Fujio Masuko
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Patent number: 4727204Abstract: 5-Ethylidene-2-norbornene with high quality is effectively prepared by isomerization 5-vinyl-2-norbornene containing 1 ppm to 0.5% by weight of 4-vinylcyclohexene in the presence of at least one catalyst selected from the group consisting of a solid base catalyst which is prepared by reacting alumina, an alkali metal hydroxide and an alkali metal in a temperature range of 200.degree. to 500.degree. C. and a solid base catalyst which is prepared by reacting water-containing alumina and an alkali metal in such an amount that exceeds a molar equivalent of water contained in alumina at a temperature in a range between a melting point of the alkali metal and 500.degree. C. in an inert gas atmosphere.Type: GrantFiled: December 18, 1986Date of Patent: February 23, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Gohfu Suzukamo, Masami Fukao, Fujio Masuko, Masahiro Usui, Kazuo Kimura
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Patent number: 4584410Abstract: In a Reimer-Tiemann reaction for the preparation of a mixture of two hydroxybenzaldehydes (i.e., salicylaldehyde and p-hydroxybenzaldehyde) by reacting phenol with chloroform and an aqueous alkali solution in a heterogeneous system, the two hydroxybenzaldehydes can be prepared in a controlled formation ratio, yield and reaction rate depending upon the conditions used when the reaction is carried out in the presence of a phase transfer catalyst selected from the group consisting of a cationic type phase transfer catalyst, an amphoteric type phase transfer catalyst and an anionic type phase transfer catalyst.Type: GrantFiled: November 13, 1984Date of Patent: April 22, 1986Assignee: Sumitomo Chemical Co., Ltd.Inventors: Kazuhiko Hamada, Gohfu Suzukamo, Fujio Masuko, Makoto Nakamura
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Patent number: 4536599Abstract: An amine of the formula, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each hydrogen, alkyl or the like and n is 1, 2 or 3, including .alpha.-phenyl-.beta.-(p-tolyl)-ethylamine, which is useful as an optically resolving agent, an intermediate of medicines and the like, is effectively produced by a novel process comprising hydrolysis of the corresponding nitrile of the formula, ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and n are the same as above, followed by alkali-decomposition of the resulting amide of the formula, ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and n are the same as above. An amide including the above one is effectively produced by hydrolysis of the corresponding nitrile in the presence of a base and hydrogen peroxide using an organic quaternary ammonium salt and/or a tertiary amine as a catalyst.Type: GrantFiled: November 1, 1979Date of Patent: August 20, 1985Assignee: Sumitomo Chemical Company, LimitedInventors: Fujio Masuko, Tadashi Katsura
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Patent number: 4297508Abstract: A process for producing 2-hydroxynaphthalene-3-carboxylic acid comprising reacting carbon dioxide with a homogeneous liquid mixture comprising an alkali metal salt of .beta.-naphthol, .beta.-naphthol and a specific alkylbenzene is disclosed.Type: GrantFiled: December 22, 1980Date of Patent: October 27, 1981Assignee: Sumitomo Chemical Company, LimitedInventors: Yuzo Maegawa, Fujio Masuko, Makoto Nakamura
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Patent number: 4220592Abstract: A substituted acetonitrile such as .alpha.-isopropyl-p-chlorophenylacetonitrile is hydrolyzed using an acid to produce the corresponding substituted phenylacetic acid such as .alpha.-isopropyl-p-chlorophenylacetic acid in such a manner that, in a lot in any one hydrolysis reaction, (1) the hydrolysis is carried out in at least two steps, (2) an acid to be used in a subsequent first reaction step is a waste acid produced in a previous second reaction step and the subsequent reaction step(s) thereof if any, and (3) an acid to be used in a second reaction step and the subsequent reaction step(s) if any, is the waste acid produced in a previous second reaction step and subsequent reaction step(s), respectively, and a fresh acid.Type: GrantFiled: July 10, 1978Date of Patent: September 2, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Keiji Kagawa, Naoya Kanda, Fujio Masuko, Hirotoshi Nakanishi
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Patent number: 4172782Abstract: An organic quaternary ammonium salt used as a catalyst in a reaction between a benzylnitrile and a halide in the presence of an alkali to obtain an .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile, is recovered effectively from the reaction solution containing the .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile, the alkali and the catalyst, by adding water to the reaction solution to make the alkali concentration of the water layer 10% by weight or below, and then separating the water layer containing the organic quaternary ammonium salt from the oil layer containing the .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile.Type: GrantFiled: May 18, 1978Date of Patent: October 30, 1979Assignee: Sumitomo Chemical Company, LimitedInventors: Fujio Masuko, Hiroshi Yamachika, Kazuhiko Fujiyoshi, Katsuyuki Shiota
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Patent number: 4152170Abstract: Cross-linked pullulans are obtained by the reaction of pullulan with a cross-linking agent selected from the group consisting of polycarboxylic acids, halogenated dicarboxylic acids, polycarboxylic anhydrides, aldehyde compounds, N-methylol compounds, isocyanate compounds, metaphosphoric acid salts, divinyl compounds, bis-aziridine and bifunctional compounds of the formula,X--R--Zwherein X and Z are each a halogen atom or an epoxy group and R is an aliphatic residue having 1 to 30 carbon atoms, in a solvent, and are useful as gels or beds for chromatography or in various fields requiring high degrees of water absorbency and retention.Type: GrantFiled: June 14, 1976Date of Patent: May 1, 1979Assignees: Sumitomo Chemical Company, Ltd., Hayashibara Biochemical Laboratories, Inc.Inventors: Tsuneyuki Nagase, Kozo Tsuji, Masanori Fujimoto, Fujio Masuko
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Patent number: 4144264Abstract: A process for producing 3-methyl-2-(4-halophenyl)butyronitrile, which is an important intermediate for the production of insecticides, in a high yield and a high purity even on a commercial scale comprising reacting a p-halophenylacetonitrile having a p-halobenzyl alcohol content of not more than 1.0 % by weight, with an isopropyl halide having an isopropyl alcohol content of not more than 1.0 % by weight.Type: GrantFiled: August 19, 1977Date of Patent: March 13, 1979Assignee: Sumitomo Chemical Company, LimitedInventors: Fujio Masuko, Kazuhiko Fujiyoshi, Yoshitaka Ume, Shinji Nakai, Shigeyoshi Kitamura, Takeaki Umemura
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Patent number: 4090016Abstract: Carboxylated pullulan obtained by oxidizing pullulan with an oxidizing agent is readily soluble in cold water and has favorable film-forming property, yielding a film having high mechanical strengths, high modulus of elasticity and good transparency.Type: GrantFiled: May 24, 1976Date of Patent: May 16, 1978Assignees: Sumitomo Chemical Company, Limited, Hayashibara Biochemical Laboratories, Inc.Inventors: Kozo Tsuji, Masanori Fujimoto, Fujio Masuko, Tsuneyuki Nagase