Patents by Inventor Yuji Ueda
Yuji Ueda 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: 5420331Abstract: This invention provides a process for producing a cyclic carbonate compound represented by the following formula (5): ##STR1## or the like which is useful as a dissolution inhibitor for use in a chemically amplified positive photoresist, as well as a positive photoresist composition comprising said cyclic carbonate compound, an alkali-soluble resin and a photo-induced acid precursor. This composition gives a positive photoresist excellent in performances such as resolution, profile, sensitivity, etc.Type: GrantFiled: April 5, 1994Date of Patent: May 30, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Yuji Ueda, Naoki Takeyama, Hiromi Ueki, Takehiro Kusumoto
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Patent number: 5397679Abstract: This invention provides a process for producing a cyclic carbonate compound represented by the following formula (5): ##STR1## or the like which is useful as a dissolution inhibitor for use in a chemically amplified positive photoresist, as well as a positive photoresist composition comprising said cyclic carbonate compound, an alkali-soluble resin and a photo-induced acid precursor. This composition gives a positive photoresist excellent in performances such as resolution, profile, sensitivity, etc.Type: GrantFiled: April 9, 1993Date of Patent: March 14, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Yuji Ueda, Naoki Takeyama, Hiromi Ueki, Takehiro Kusumoto
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Patent number: 5395727Abstract: A novolak resin made from a carbonyl compound and a specific phenol compound, which resin has good properties, in particular, as a base resin of a photoresist.Type: GrantFiled: November 29, 1993Date of Patent: March 7, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Yasunori Uetani, Haruyoshi Osaki, Naoki Takeyama, Yuji Ueda, Hiromi Ueki, Takehiro Kusumoto
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Patent number: 5304456Abstract: A negative photoresist composition containing an alkali-soluble resin which is obtainable through a condensation reaction of an aldehyde with a phenol compound containing a compound of the general formula: ##STR1## wherein R.sup.1 to R.sup.9 are independently a hydrogen atom, an alkyl group, an alkenyl group, an alkylcarbonyl group, a halogen atom or a hydroxyl group, provided that at least one of R.sup.1 to R.sup.9 is a hydroxyl group and, at the ortho- or para-position to the hydroxyl group, at least two hydrogen atoms are present; a cross linking agent; and a photo-acid generator, and a negative photoresist composition comprising an alkali-soluble resin, a cross linking agent and a photo-acid generator having a trifluoromethanesulfonic acid ester group, which can increase resolution and contrast of a photoresist pattern.Type: GrantFiled: January 29, 1992Date of Patent: April 19, 1994Assignee: Sumitomo Chemical Company, LimitedInventors: Yuji Ueda, Hiromi Ueki, Naoki Takeyama, Takehiro Kusumoto
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Patent number: 5235068Abstract: Acylaromatic compounds ##STR1## (Q: aromatic compound residue; R: straight, branched or cyclic aliphatic group, aromatic group or araliphatic group) are prepared in high yield by a reaction, in the presence of a boron trifluoride complex catalyst, of an aromatic compound with ##STR2## (X: H, Cl, Br; Y: Cl, Br) or with RCOOH in the presence of (XYCHCO).sub.2 O.Type: GrantFiled: July 21, 1992Date of Patent: August 10, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Masayoshi Minai, Michitada Kondo, Yuji Ueda, Seiichi Kai, Takayuki Higashii
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Patent number: 4957867Abstract: A process for preparing an optically active cyclopentenone of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group and n is an integer of 4 to 8, which comprises contacting a dl-cyclopentenone ester of the formula: ##STR2## wherein R and n are each as defined above and R' is a lower alkyl group optionally substituted with halogen on an enzyme having a capability of hydrolyzing selectively either one of the d- or l-form isomer in the dl-cyclopentenone ester (II) in an aqueous medium for asymmetric hydrolysis.Type: GrantFiled: May 29, 1987Date of Patent: September 18, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Masayoshi Minai, Yuji Ueda, Takayuki Higashii, Michitada Kondo, Seiichi Kai
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Patent number: 4812585Abstract: 2-Acylfuran derivatives ##STR1## (R: alkyl, phenyl, etc.; R.sub.1 : H, alkyl) are prepared in high yield by reaction, in the presence of a boron trifluoride complex catalyst, of a furan compound ##STR2## (X: H, Cl, Br; Y: Cl, Br) or with RCOOH in the presence of (XYCHCO).sub.2 O.Type: GrantFiled: October 15, 1987Date of Patent: March 14, 1989Assignee: Sumitomo Chemical Company, LimitedInventors: Michitada Kondo, Masayoshi Minai, Seiichi Kai, Takayuki Higashii, Yuji Ueda
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Patent number: 4714782Abstract: A process for preparing an optically active 2-substituted or unsubstituted-4-hydroxy-2-cyclopentenone of the formula: ##STR1## wherein R is a hydrogen atom, an allyl group or a propargyl group, which comprises reacting the corresponding 2-substituted or unsubstituted-4-hydroxy-2-cyclopentenone of the formula: ##STR2## wherein R is defined above with a lactone chosen from (1R,5S)-6,6-dimethyl-4-hydroxy-3-oxabicyc lo[3.1.0]hexan-2-one or (1S,5R)-6,6-dimethyl-4-hydroxy-3-oxabicyclo[3.1.0]hexan-2-one in a molar ratio of 1.5 - 2:1 in the presence of p-toluenesulfonic acid or benzenesulfonic acid in the coexistence of an organic solvent under elimination of water as an azeotropic mixture with the organic solvent to obtain a reaction mixture comprising (1R,5S)-6,6-dimethyl-3-oxa-4(R)-[1(R)-4-oxo-2-substituted or unsubstituted-2-cyclopentenyloxy]bicyclo[3.1.0]hexan-2-one or (1S,5R)-6,6-dimethyl-3-oxa-4(S)-[1(S)-4-oxo-2-substituted or unsubstituted-2-cyclopentenyloxy]bicyclo[3.1.Type: GrantFiled: February 12, 1985Date of Patent: December 22, 1987Assignee: Sumitomo Chemical Co., Ltd.Inventors: Masayoshi Minai, Yuji Ueda
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Patent number: 4683323Abstract: By hydrolyzing a sulfonic acid ester or a nitric acid ester of an optically active 4-hydroxy-2-cyclopentenone, the steric inversion of the hydroxyl group at the 4-position of the cyclopentenone mentioned above is effected.4-hydroxy-2-cyclopentenone is useful as a raw material of prostaglandins (natural substance is an (R)-substance) having stimulative action to uterine muscle and vasodilator action. For instance, 4(S)-hydroxy-2-cyclopentenone can be configurationally inverted to R-isomer. Accordingly, this method is extremely meaningful in the synthesis of prostaglandins.Type: GrantFiled: July 25, 1985Date of Patent: July 28, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Masayoshi Minai, Yuji Ueda
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Patent number: 4596943Abstract: A shadow mask for a color picture tube, which has a plurality of regularly aligned apertures, an oxide film having good adhesion and anticorrosion characteristics which is made of a metal alloy consisting of as the major constituents, iron and nickel, wherein an iron content of at least a surface layer of a portion of the shadow mask which has the apertures is higher than that of the substrate of the metal alloy.Type: GrantFiled: January 30, 1984Date of Patent: June 24, 1986Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Eiichi Akiyoshi, Yuji Ueda
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Patent number: 4352941Abstract: Crude phenylhydrazine is distilled in the presence of a glycol to obtain phenylhydrazine of high purity in a high yield.Type: GrantFiled: June 28, 1978Date of Patent: October 5, 1982Assignee: Sumitomo Chemical Company, LimitedInventors: Shinichi Hasegawa, Yuji Ueda, Hiroshige Tomita
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Patent number: 4336109Abstract: Acetone having a markedly low content of aldehydes is recovered from an aqueous rectification residue brought about by rectification of crude acetone carried out after one crude acetone having been alkali-treated or while an alkali or an aqueous solution thereof being added to the crude acetone, by mixing the aqueous rectification residue with an alkali, neutralizing the mixture to a pH of 4 to 9, and then subjecting the resulting mixture to distillation to obtain acetone as a distillate.Type: GrantFiled: May 19, 1980Date of Patent: June 22, 1982Assignee: Sumitomo Chemical Company, LimitedInventors: Hirokazu Hosaka, Kenji Tanimoto, Kunihiko Tanaka, Toshiharu Morita, Katsuyuki Shiota, Yuji Ueda, Seiichi Kai
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Patent number: 4308110Abstract: Highly decolorized, purified hydroquinone and resorcinol can be separated from each other from a mixture containing hydroquinone and resorcinol and recovered by continuously rectifying the mixture, thereby obtaining rectification bottoms containing resorcinol and hydroquinone in a ratio by weight of resorcinol to hydroquinone of 0.1-1:1 while obtaining resorcinol as a distillate, redistilling the rectification bottoms, contacting hydroquinone vapor with water vapor, condensing the hydroquinone vapor in the presence of the water vapor, thereby recovering hydroquinone as an aqueous hydroquinone solution, and then recrystallizing the aqueous hydroquinone solution, if necessary, in the presence of an organic solvent, thereby separating hydroquinone from the aqueous solution.Type: GrantFiled: October 3, 1980Date of Patent: December 29, 1981Assignee: Sumitomo Chemical Company LimitedInventors: Hirokazu Hosaka, Kunihiko Tanaka, Toshiharu Morita, Katsuyuki Shiota, Yuji Ueda
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Patent number: 4059637Abstract: A method for extracting a dihydroperoxide of a dialkylbenzene of the formula, ##STR1## wherein each R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is independently a lower alkyl group, from an aqueous alkali solution of the said dihydroperoxide with at least one organic solvent selected from the group consisting of C.sub.4 -C.sub.10 ketones, C.sub.4 -C.sub.10 ethers and C.sub.4 -C.sub.8 alcohols, which comprises extracting the dihydroperoxide by a countercurrent multi-stage extraction at a temperature between 0.degree. and 85.degree. C with a temperature gradient, the aqueous alkali solution being fed to the lower temperature zone, the organic solvent being fed to the higher temperature zone, and each aqueous alkali solution and organic solvent being fed countercurrently, whereby the dihydroperoxide is obtained in the form of organic solvent solution from the lower temperature zone.Type: GrantFiled: August 22, 1975Date of Patent: November 22, 1977Assignee: Sumitomo Chemical Company, LimitedInventors: Hirokazu Hosaka, Kenji Tanimoto, Hiromichi Okabe, Kunthiko Tanaka, Yuji Ueda, Iwao Dohgane
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Patent number: 4021495Abstract: A process for purifying crude .beta.-naphthol obtained via an alkylnaphthalene hydroperoxide, comprising subjecting the crude .beta.-naphthol to a recrystallization treatment using (1) an aliphatic or alicyclic hydrocarbon solvent having 5 to 10 carbon atoms, or (2) a mixed solvent comprising the aliphatic or alicyclic hydrocarbon solvent and at least one other solvent selected from the group consisting of benzene, a benzene derivative, a ketone, an alcohol, an ether and an ester.Type: GrantFiled: June 18, 1975Date of Patent: May 3, 1977Assignee: Sumitomo Chemical Company, LimitedInventors: Hirokazu Hosaka, Kunihiko Tanaka, Yuji Ueda
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Patent number: 3969420Abstract: Resorcinol and hydroquinone are recovered in mixture at a high purity from a solution containing resorcinol and hydroquinone, especially, a solution resulting from cleavage of oxidation products of isopropylbenzene and successive distillation of the cleavage product thereby to remove lower and higher boiling components therefrom, by adding 0.Type: GrantFiled: July 2, 1973Date of Patent: July 13, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
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Patent number: 3953521Abstract: Meta-and/or paradiisopropylbenzene dihydroperoxides are continuously produced by oxidizing meta-and/or paradiisopropylbenzenes in liquid phase through contact with oxygen or a gas containing oxygen, while keeping the concentration of meta-and/or paradiisopropylbenzene monohydroperoxides of the oxidation product solution in a range of 20 to 40% by weight.Type: GrantFiled: June 27, 1975Date of Patent: April 27, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
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Patent number: 3950431Abstract: Impurities, that is, by-products, in an oxidation product solution obtained by oxidation of diisopropylbenzene by molecular oxygen or in the oxidation product solution freed from diisopropylbenzene dihydroperoxide, are removed by extracting the by-products such as carbinols, ketones and styrenes from the solution with a mixture of an aqueous alkaline solution and at least one of alcohols having 1 to 3 carbon atoms such as methanol, ethanol, and isopropanol, as an extracting reagent at a temperature of 20.degree. to 80.degree.C.Type: GrantFiled: September 20, 1973Date of Patent: April 13, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
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Patent number: 3933921Abstract: In a process for the production of hydroperoxides by the oxidation of an aromatic hydrocarbon having at least one tertiary carbon atom with oxygen or an oxygen containing gas in the presence of an aqueous alkaline solution, an improvement is made in that the oxidation is effected in an emulsion phase which is caused by powerfully mixing all or a part of the materials to be brought into the oxidation reaction only by the aid of the hydroperoxides formed in the reaction, whereby enhancing the reaction rate with safety.Type: GrantFiled: June 18, 1973Date of Patent: January 20, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka
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Patent number: 3932528Abstract: Dihydroperoxides of dialkylaromatic hydrocarbons are separated in high yield from an aqueous alkaline solutions of hydroperoxides containing the dihydroperoxides by adding 0.01 to 1 % by weight of a compound having a nitrogen base, such as ammonia and aromatic amines, to the solution, based on the weight of the solution, thereby stabilizing the dihydroperoxides in the solution, and separating the dihydroperoxides therefrom by extraction.Type: GrantFiled: August 27, 1973Date of Patent: January 13, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Hideaki Suda, Iwao Dohgane, Takashi Chinuki, Kenji Tanimoto, Hirokazu Hosaka, Yukimichi Nakao, Yuji Ueda, Seiya Imada, Hideki Yanagihara, Kunihiko Tanaka