Patents by Inventor Shigeki Nagai
Shigeki Nagai 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: 5181959Abstract: The present invention relates to a high-concentration starch adhesive prepared by treating a starch slurry at a temperature of 100.degree. C. or above to form a gelatinized solution and suspending an ungelatinized starch in the gelatinized solution. According to the present invention, the viscosity of the starch adhesive can be kept stable over a long period of time; the problems such as warp due to the expansion and contraction, by the absorption of water, of the material to be adhered, can be solved; and the quantity of heat necessitated in the adhesion step can be much reduced.Type: GrantFiled: December 28, 1989Date of Patent: January 26, 1993Assignee: Honshu Paper Co., Ltd.Inventors: Shigeki Nagai, Haruo Sato, Nagahisa Karube
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Patent number: 5096491Abstract: The present invention relates to a high concentration aqueous starch slurry adhesive comprising 20 to 60% of starch and the following components in the specified amount based on the weight of starch:(1) 0.01 to 1.0% of rhamsan gum or xanthan gum,(2) 1.0 to 3.0% of sodium hydroxide, and(3) if necessary, up to 3% of sodium tetraborate.According to the present invention, a high concentration aqueous starch slurry adhesive can be easily obtained at a single step by merely dispersing starch into cold water while stirring.Type: GrantFiled: July 16, 1990Date of Patent: March 17, 1992Assignee: Honshu Paper Co., Ltd.Inventors: Shigeki Nagai, Kohei Hamazaki, Nagahisa Karube
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Patent number: 4464375Abstract: 4-Anilinoquinazoline derivatives of formula (I): ##STR1## (in which: R.sup.1 represents a hydrogen atom, a halogen atom, a trifluoromethyl group or a nitro group;R.sup.2 represents a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, an alkoxy group or a halogen atom; andR.sup.3 represents a hydrogen atom cr a C.sub.1 -C.sub.4 alkyl group)and pharmaceutically acceptable salts thereof are, except where R.sup.1 represents a hydrogen atom or a chlorine atom in the 6- position when R.sup.2 and R.sup.3 both represent hydrogen atoms, new compounds and have been found to possess valuable analgesic and anti-inflammatory activities. These compounds can be prepared by heating the appropriate 4-haloquinazoline with an appropriate aniline or aniline derivative.Type: GrantFiled: August 3, 1981Date of Patent: August 7, 1984Assignees: Sankyo Co., Ltd., Ube Industries Ltd.Inventors: Shinsaku Kobayashi, Katsuo Kamoshita, Shigeki Nagai, Takeo Honda, Kiroku Oda, Katsutoshi Fujii, Takashi Kobayashi, Mikio Kojima
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Patent number: 4421761Abstract: Thiophene derivatives of the formula ##STR1## wherein X, Y and Z are as herein defined, said compounds being useful as fungicides, are described.Type: GrantFiled: January 27, 1981Date of Patent: December 20, 1983Assignees: Hokko Chemical Industry Co. Ltd., Ube Industries, Ltd.Inventors: Shigeki Nagai, Takashi Yorie, Hisao Sugiura, Toru Hibi, Katsumi Sato, Takuo Wada, Masahiko Miyahara
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Patent number: 4323680Abstract: Agricultural fungicidal compositions containing as an active ingredient one or more 4-aminoquinazoline derivatives. The amino group is substituted, e.g., with a phenoxyalkylene, and the quinazoline nucleus may be substituted at 2- and or 6-positions.Type: GrantFiled: March 28, 1980Date of Patent: April 6, 1982Assignees: Sankyo Company Limited, Ube Industries, Ltd.Inventors: Kazuto Nakagami, Shinji Yokoi, Kenji Nishimura, Shigeki Nagai, Takeo Honda, Kiroku Oda, Katsutoshi Fujii, Ryuji Kobayashi, Mikio Kojima
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Patent number: 4322420Abstract: A method of using 4-anilinoquinazoline derivatives of formula (I): ##STR1## (in which: R.sup.1 represents a hydrogen atom, a halogen, atom, a trifluoromethyl group or a nitro group;R.sup.2 represents a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, an alkoxy group or a halogen atom; andR.sup.3 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group)and pharmaceutically acceptable salts thereof are, provided that R.sup.1 does not represents a hydrogen atom or a chlorine atom in the 6- position when R.sup.2 and R.sup.3 both represent hydrogen atoms, as an analgesic and anti-inflammatory in the treatment of mammals. These compounds can be prepared by heating the appropriate 4-haloquinazoline with an appropriate aniline or aniline derivative.Type: GrantFiled: September 11, 1979Date of Patent: March 30, 1982Assignees: Sankyo Company Limited, UBE IndustriesInventors: Shinsaku Kobayashi, Katsuo Kamoshita, Shigeki Nagai, Takeo Honda, Kiroku Oda, Katsutoshi Fujii, Takashi Kobayashi, Mikio Kojima
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Patent number: 4304778Abstract: 4-Aminoquinazoline derivatives of formula (I): ##STR1## (wherein: R.sup.1 represents an alkyl group, a cycloalkyl group, an alkenyl group or a benzyl group;R.sup.2 and R.sup.3 are the same or different and each represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom;X represents a straight or branched chain alkylene group; andn is 0 or 1)and salts and hydrates thereof are valuable fungicidal, anti-insect (insect-repellent and insecticidal) and acaricidal compounds and thus can be used to treat or prevent many diseases affecting agricultural and horticultural plants, while, at the same time, having a much lower toxicity to fish than is exhibited by other known compounds.Type: GrantFiled: November 27, 1979Date of Patent: December 8, 1981Assignees: Sankyo Company Limited, Ube Industries, Ltd.Inventors: Kazuto Nakagami, Shinji Yokoi, Kenji Nishimura, deceased, Shigeki Nagai, Takeo Honda, Kiroku Oda, Katsutoshi Fujii, Takashi Kobayashi, Mikio Kojima
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Patent number: 4213775Abstract: New diphenyl ether derivatives having one to three substituents selected from a halogen atom and a trifluoromethyl group at any optional one to three positions of the 2'-, 3'-, 4'-, 5'- and 6'-positions in one phenyl moiety and nitro group at the 4-position and unsubstituted or substituted aminosulfonyl group at the 3-position in another phenyl moiety. They have a superior herbicidal effect and can be prepared starting from a known 3-benzylmercapto compound through three steps.Type: GrantFiled: January 26, 1979Date of Patent: July 22, 1980Assignee: Ube Industries, Ltd.Inventors: Shigeki Nagai, Hakobu Sekioka, Mitsuaki Takenaka, Masazumi Sakata, Yosio Kawaguchi, Seiji Takamura, Minoru Nishimura
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Patent number: 4213987Abstract: Agricultural fungicidal compositions containing as an active ingredient one or more 4-aminoquinazoline derivatives. The amino group is substituted, e.g., with a phenoxyalkylene, and the quinazoline nucleus may be substituted at 2- and or 6-positions.Type: GrantFiled: May 30, 1978Date of Patent: July 22, 1980Assignees: Sankyo Company Limited, Ube Industries, Ltd.Inventors: Kazuto Nakagami, Shinji Yokoi, Kenji Nishimura, Shigeki Nagai, Takeo Honda, Kiroku Oda, Katsutoshi Fujii, Ryuji Kobayashi, Mikio Kojima
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Patent number: 4048236Abstract: In a process for preparing an o-alkoxy-p-allylphenol comprising reaction of an o-alkoxyphenol with an allyl halide in the presence of an aqueous solution of an alkali metal hydroxide or alkaline earth metal hydroxide, the improvement which comprises employing a copper-containing compound such as a water-soluble copper salt, an ammine copper complex salt etc., as the catalyst. The process for preparing an o-alkoxy-p-allylphenol which comprises reaction of an o-alkoxyphenol with an allyl halide in an aqueous ammonia is also disclosed.Type: GrantFiled: February 17, 1976Date of Patent: September 13, 1977Assignee: UBE Industries, Ltd.Inventors: Shigeki Nagai, Fumio Iwata, Kenzi Kubo
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Patent number: 4025566Abstract: Process for preparing monoalkyl ethers of dihydric phenols using a catalyst comprising Al, B and P.Type: GrantFiled: February 10, 1976Date of Patent: May 24, 1977Assignee: UBE Industries, Ltd.Inventors: Shigeki Nagai, Hiroshi Yoshida, Teruhiko Inoue