Patents by Inventor Shuichi Sakamoto
Shuichi Sakamoto 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).
-
Patent number: 5834460Abstract: A serine derivative represented by the general formula (I) ##STR1## (symbols in the formula represent the following meanings; X: a sulfur atom or an oxygen atom,Y: a nitrogen atom or CH,R.sup.1 and R.sup.2 : the same or different from each other and each represents a hydrogen atom, a lower alkyl group or a protecting group for the amino group, or R.sup.1 and R.sup.2 may be combined together to form a four- to nine-membered nitrogen-containing cycloalkyl group,R.sup.3 : a hydrogen atom, a carboxyl group, a protected carboxyl group, an aralkyl group, or a lower alkyl group unsubstituted or substituted with a hydroxyl group,R.sup.4 : a hydrogen atom or a hydroxyl group,R.sup.Type: GrantFiled: October 12, 1995Date of Patent: November 10, 1998Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Ichio Noda, Masahiro Iwata, Shuichi Sakamoto, Kazuo Koshiya, Takuma Morita, Atsuyuki Kohara
-
Patent number: 5772811Abstract: A heavy duty radial tire is to be mounted on a 15 degree drop center rim. In a mounted state that the tire is mounted on the rim and inflated to 0.5 ksc but not loaded, the inside diameter BC of the bead cores at the radially innermost point thereof is set to being not more than the diameter BT at the heel point of the bead portions. In a demounted state that the tire is demounted from a rim, the bead bottom is tapered towards the axial inside of the tire at an angle .theta. of from 1.0 to 1.9 times the angle .alpha. of the tapered bead seat of the rim. In the mounted state, the bead core has a radially inner surface tapered at the substantially same angle as the bead seat, and the axial distance BP of the axially inner end of this tapered inner surface from the bead heel point is set in the range of from 1.3 to 2.1 times the maximum width BW of the bead core measured in the direction parallel to the bead seat.Type: GrantFiled: June 13, 1996Date of Patent: June 30, 1998Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kiyoshi Ueyoko, Shuichi Sakamoto, Tsuneyuki Nakagawa, Kazuki Numata
-
Patent number: 5686482Abstract: N-(3-Pyrrodinyl)benzamide derivatives represented by the following general formula (I) which have potent and selective antagonism against dopamine D.sub.3 and/or D.sub.4 receptor and are useful as a psychotropic, a schizophrenia-treating agent and the like, or a pharmaceutically acceptable salt thereof or a pharmaceutical preparation thereof.Type: GrantFiled: October 2, 1996Date of Patent: November 11, 1997Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Junya Ohmori, Kyoichi Maeno, Kazuyuki Hidaka, Kazuhiro Nakato, Shuichi Sakamoto, Shin-ichi Tsukamoto
-
Patent number: 5611611Abstract: A rear projection type display system with a transmissive screen. A transparent reinforcing plate is coupled to a lenticular sheet of the screen on the light output side by a connective member to broaden the horizontal diverging angle by 60 degrees or more to the right and left sides. The duty factor of a black stripe formed on the lenticular sheet is set to 60% or more so improve the contrast of an image. The diverging angle at each point of a vertically-diffusing lens for diverging light in the vertical direction is modulated in accordance with the height of each point to offer a proper visual angle range in the vertical direction.Type: GrantFiled: March 9, 1995Date of Patent: March 18, 1997Assignee: Hitachi, Ltd.Inventors: Masanori Ogino, Yoshiaki Iwahara, Shoji Kuroda, Shuichi Sakamoto, Takashi Itoh, Makoto Kamiya
-
Patent number: 5467221Abstract: A multi-screen projector having unit module projectors stacked at two higher and lower stages, each unit module projector having a screen with a Fresnel sheet unit, a prism sheet unit, and a lenticular sheet unit. By the functions of the Fresnel sheet unit and the prism sheet unit, main output light from higher and lower screens is converged to substantially the same target point. Only one type of metal molds is required for the Fresnel sheet unit as well as the prism sheet unit, thereby reducing the manufacturing cost of the multi-screen projector.Type: GrantFiled: August 15, 1994Date of Patent: November 14, 1995Assignee: Hitachi, Ltd.Inventors: Yoshiaki Iwahara, Shoji Kuroda, Shuichi Sakamoto, Masanori Ogino
-
Patent number: 5455235Abstract: The present invention provides a food composition for inhibiting the formation of an intestinal putrefactive product, containing lactosucrose as an effective component. This food composition is low in calorific value because the lactosucrose is indigestible, and can decrease the amount of an putrefactive product to be generated in intestines. Accordingly, this food composition effectively prevents the outbreak of a variety of cancers for which the putrefactive product might serve as a promoter.Type: GrantFiled: February 9, 1994Date of Patent: October 3, 1995Assignee: Otsuka Pharmaceutical Co., Ltd.Inventors: Akihisa Takaichi, Toshihiko Okamoto, Yoshihide Azuma, Yoshinari Watanabe, Toshiaki Matsumoto, Katsuya Miyata, Shuichi Sakamoto, Hiroshi Okamatsu, Megumi Kumemura
-
Patent number: 5283244Abstract: The present invention is a pyrazine derivative which has glutamate receptor antagonizing activity, represented by formula: ##STR1## wherein Z represents C or N, provided that two Zs are not N atoms at the same time; R.sup.1 represents: ##STR2## wherein ##STR3## represents ##STR4## R.sup.6 represents H or alkyl, and R.sup.7 and R.sup.8 represent each H, alkyl, nitro or phenyl, or alternatively R.sup.7 and R.sup.8 are combined together to represent butadienylene or 1,4-butylene; R.sup.2 and R.sup.3 represent each H, F, cyano, acyl, nitro, alkyl, morpholino or one of said species of R.sup.1 ; R.sup.4 and R.sup.5 represent each H, hydroxyl, alkyl, cycloalkyl, heterocycle, phenyl, or Y-substituted alkyl; Y represents hydroxyl, acyloxy, F-substituted methyl, cycloalkyl, tetrahydrofuryl, carboxyl, alkoxycarbonyl or ##STR5## R.sup.9 and R.sup.10 represent each H or alkyl, or alternatively R.sup.9 and R.sup.10 are combined together to represent a 5- or 6-membered cyclic group which may contain oxygen atom(s).Type: GrantFiled: May 3, 1993Date of Patent: February 1, 1994Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Shuichi Sakamoto, Junya Ohmori, Hirokazu Kubota, Masao Sasamata, Masamichi Okada, Kazuyuki Hidaka
-
Patent number: 5246985Abstract: The rubber composition comprising a cellulosic material containing-processed powder product and rubber components and a studless tire having a tread portion that contains said rubber composition which is improved in the performance of travelling over snow and ice is disclosed.Type: GrantFiled: April 7, 1992Date of Patent: September 21, 1993Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Yuichi Saito, Shuichi Sakamoto, Naohiko Kikuchi, Takao Wada, Mamoru Uchida, Kiyoshige Muraoka
-
Patent number: 5200854Abstract: The object of the invention is to provide a large-screen projection-type display using a transmission-type screen, wherein the transmission-type screen is formed of two or more sheets 4, 7, is tilted toward the viewer's side with a small gap kept between the sheets, and is stable relative to the temperature and moisture change of the environment. The front sheet 4 provided on the viewer's side and the Fresnel sheet 7 provided on the projection source side are tilted forward by about 7.degree. toward the viewers. The springs 10 are extended through wires 9 to exert the tension on the front sheet 4 in the vertical direction. At the same time, the springs exert a pressure on the Fresnel sheet 7 in the vertical direction.Type: GrantFiled: February 20, 1992Date of Patent: April 6, 1993Assignees: Hitachi, Ltd., Hitachi Video & Information System, Inc.Inventors: Masanori Ogino, Yoshiaki Iwahara, Shuichi Sakamoto, Yukihiro Kobayashi
-
Patent number: 5101022Abstract: Mycaminosyl tylonolide derivatives represented by the following general formula ##STR1## (wherein R.sup.1 denotes hydroxyl group, a lower alkanoyloxy group, benzoyloxy group, azido group, or amino group which may optionally be substituted with a lower alkyl or a lower alkanoyl radical; R.sup.2 stands for hydrogen atom or hydroxyl group; R.sup.3 expresses hydrogen atom or formyl group; and means a double bond or a radical represented by ##STR2## and salts thereof.Type: GrantFiled: February 4, 1991Date of Patent: March 31, 1992Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Hamao Umezawa, Sumio Umezawa, Tsutomu Tsuchiya, Tomio Takeuchi, Akihiro Tanaka, Shuichi Sakamoto
-
Patent number: 5096888Abstract: 3-Deoxy mycaminosyl tylonolide derivatives represented by the following general formula and salts thereof: ##STR1## wherein X represents an oxygen atom or .dbd.N--OR.sup.4 (wherein R.sup.4 represents hydrogen or lower alkyl); R.sup.1 represents a hydrogen atom, an acyl group or an alkylsilyl group; R.sup.2 represents a hydrogen atom or an acyl group; and R.sup.3 represents a hydrogen atom or a hydroxyl group. The compounds of this invention of the formula (I) are novel compounds and have excellent antibacterial activity.Type: GrantFiled: September 24, 1990Date of Patent: March 17, 1992Assignee: Zaidan Hojin Biseibutsu Kagaku KenkyikaiInventors: Sumio Umezawa, Tsutomu Tsuchiya, Tomio Takeuchi, Shunji Kageyama, Shuichi Sakamoto
-
Patent number: 5049598Abstract: A rubber composition comprising a cellulosic material containing-processed powder product and rubber components and a studless tire having a tread portion that contains said rubber composition which is improved in the performance of travelling over snow and ice is disclosed.Type: GrantFiled: October 26, 1990Date of Patent: September 17, 1991Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Yuichi Saito, Shuichi Sakamoto, Naohiko Kikuchi, Takao Wada, Mamoru Uchida, Kiyoshige Muraoka
-
Patent number: 5041428Abstract: (Cycloalkylamino)methylenebis(phosphonic acid) represented by the general formula: ##STR1## in which, R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, and n represents an integer from 3 to 10, a lower alkyl ester thereof or a pharmaceutically acceptable salt thereof; and a bone-resorption inhibitor and an anti-arthritis containing the same.Type: GrantFiled: July 10, 1990Date of Patent: August 20, 1991Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Yasuo Isomura, Makoto Takeuchi, Shuichi Sakamoto, Tetsushi Abe
-
Patent number: 5013725Abstract: Substituted aminomethylenebis(phosphonic acid) derivatives represented by the general formula: ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be the same or different, each represents a hydrogen atom or a lower alkyl group; "m" is zero or represents an integer from 1 to 4; and a ring "A" represents a cycloalkenyl group having 5 to 8 carbon atoms, a bicycloheptyl group, a bicycloheptenyl group or a saturated heterocyclic group having 4 to 7 carbon atoms and containing an oxygen atom, a sulfur atom, a sulfinyl group (--SO--) or a sulfonyl group (--SO.sub.2 --), or pharmaceutically acceptable salts thereof.Type: GrantFiled: March 16, 1990Date of Patent: May 7, 1991Inventors: Yasuo Isomura, Makoto Takeuchi, Shuichi Sakamoto, Tetsushi Abe
-
Patent number: 4973576Abstract: "Novel bisphosphonic acid derivatives, and a bone resorption-inhibitor and an anti-arthritis containing a bisphosphonic acid derivative represented by the formula (I): ##STR1## wherein R.sup.2 represents a hydrogen atom, an alkyl group, etc.,R.sup.2 represents a hydrogen atom or a lower alkanoyl group,R.sup.3, R.sup.4, R.sup.5 and R.sup.6 may be the same or different, each represents a hydrogen atom or lower alkyl group.Type: GrantFiled: March 9, 1988Date of Patent: November 27, 1990Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Shuichi Sakamoto, Makoto Takeuchi, Yasuo Isomura, Kunihiro Niigata, Tetsushi Abe, Kousei Kawamuki, Masafumi Kudou
-
Patent number: 4970335Abstract: (Cycloalkylamino)methylenebis(phosphonic acid) represented by the general formula: ##STR1## in which, R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, and n represents an integer from 3 to 10, a lower alkyl ester thereof or a pharmaceutically acceptable salt thereof; and a bone-resorption inhibitor and an anti-arthritis containing the same.Type: GrantFiled: January 23, 1989Date of Patent: November 13, 1990Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Yasuo Isomura, Makoto Takeuchi, Shuichi Sakamoto, Tetsushi Abe
-
Patent number: 4945081Abstract: Mycaminosyl tylonolide derivatives represented by the following general formula ##STR1## (wherein R.sup.1 denotes hydroxyl group, a lower alkanoyloxy group, benzyloxy group, azido group, or amino group which may optionally be substituted with a lower alkyl or a lower alkanoyl radical; R.sup.2 stands for hydrogen atom or hydroxyl group; R.sup.3 expresses hydrogen atom or formyl group; and means a double bond or a radical represented by ##STR2## and salts thereof.Type: GrantFiled: August 16, 1988Date of Patent: July 31, 1990Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Hamao Umezawa, Sumio Umezawa, Tsutomu Tsuchiya, Tomio Takeuchi, Akihiro Tanaka, Shuichi Sakamoto
-
Patent number: 4933472Abstract: Substituted aminomethylenebis(phosphonic acid) derivatives represented by the general formula: ##STR1## in which R.sup.1, R.sup.2 R.sup.3 and R.sup.4 may be the same or different, each represents a hydrogen atom or a lower alkyl group; "m" is zero or represents an integer from 1 to 4; and a ring "A" represents a cycloalkenyl group having 5 to 8 carbon atoms, a bicycloheptyl group, a bicycloheptenyl group or a saturated heterocyclic group having 4 to 7 carbon atoms and containing an oxygen atom, a sulfur atom, a sulfinyl group (--SO--) or a sulfonyl group (--SO.sub.2 --),or pharmaceutically acceptable salts thereof.Type: GrantFiled: April 5, 1989Date of Patent: June 12, 1990Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Yasuo Isomura, Makoto Takeuchi, Shuichi Sakamoto, Tetsushi Abe
-
Patent number: 4914192Abstract: Mycaminosyl tylonolide derivatives represented by the following general formula ##STR1## (wherein R.sup.1 denoted hydroxyl group, a lower alkanoyloxy group, benzyloxy group, azido group, or amino group which may optionally be substituted with a lower alkyl or a lower alkanoyl radical; R.sup.2 stands for hydrogen atom or hydroxyl group; R.sup.3 expresses hydrogen atom or formyl group; and means a double bond or a radical represented by ##STR2## and salts thereof.Type: GrantFiled: September 14, 1988Date of Patent: April 3, 1990Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Hamao Umezawa, Sumio Umezawa, Tsutomu Tsuchiya, Tomio Takeuchi, Akihiro Tanaka, Shuichi Sakamoto
-
Patent number: 4906479Abstract: A feedstuff for cultivating Artemia as a feedstuff for larvae of cultivated fishes or crustaceans is provided, which feedstuff for cultivation is a product obtained by treatment of breaking the cell wall of monocellular algae, the thus obtained Artemia having a high survival rate, the body length thereof being large and the content of eisacopentaenoic acid and docosahexaenoic acid in the total fatty acids therein being much higher than those of conventional feedstuffs.Type: GrantFiled: May 11, 1988Date of Patent: March 6, 1990Assignee: The Nisshin Oil Mills, Ltd.Inventors: Kiyohiro Kitagawa, Eiji Kojima, Akira Seto, Shuichi Sakamoto, Takuji Nozawa