Patents by Inventor Isamu Maruyama

Isamu Maruyama 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).

  • Publication number: 20230219777
    Abstract: A conveying belt has a cylindrical base layer, and a surface layer that is formed on the outer peripheral surface of the base layer. The base layer contains polyimide or polyamide-imide, and has an elastic modulus from 3-7 GPa, inclusive. The surface layer is configured as a cured object from a resin composition that contains a fluororesin having a hydroxy group, an isocyanate curing agent, and a silicone copolymer. The silicone copolymer is a copolymer containing a silicone unit and another kind of unit not having a siloxane skeleton, has a hydroxy group, and contains siloxane units in a proportion of at least 95 mol% and less than 100 mol%, or from 40-70 mol%, inclusive. The silicone copolymer content in the resin composition is 1-5 parts by mass, inclusive, relative to a total 100 parts by mass of the fluororesin and the isocyanate curing agent.
    Type: Application
    Filed: March 7, 2023
    Publication date: July 13, 2023
    Applicant: Sumitomo Riko Company Limited
    Inventors: Hironari Nishioka, Daisuke Inoue, Yasuyuki Hayasaki, Sho Sakamoto, Yasuhide Watanabe, Fumio Misumi, Daiki Ito, Isamu Maruyama, Shingo Nakaichi
  • Publication number: 20210364954
    Abstract: A fixing member 10 for an electrophotographic device includes a base layer 12, a metal layer 14 formed on the based layer 12, and a protective layer 16 formed on the metal layer 14. The metal layer 14 is configured to form a predetermined pattern. The base layer 12 has a surface 12a which is covered with the metal layer 14 and a surface 12b which is not covered with the metal layer 14. The protective layer 16 continuously covers the surface 12b of the base layer 12 not covered with the metal layer 14 and a surface of the metal layer 14, and is bonded to the surface 12b of the base layer 12 not covered with the metal layers 14. The base layer 12 and the protective layer 16 contain a resin that includes an imide bond in a repeating unit.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Sumitomo Riko Company Limited
    Inventors: Kazunori TAKAKI, Hirotoshi MATSUDA, Daiki ITO, Yasuhide WATANABE, Isamu MARUYAMA, Shingo NAKAICHI, Yasuyuki HAYASAKI
  • Patent number: 4843078
    Abstract: A succinimide derivative of the formula: ##STR1## wherein R is a pyridyl or pyrimidinyl group substituted with at least one member selected from the group consisting of halogen, lower alkyl, lower alkoxy, cyano, benzyloxy, hydroxyl and amino, and n is an integer of 1 or 2, or a pharmaceutically acceptable acid addition salt thereof. The succinimide derivatives are useful as an anti-anxiety drugs.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: June 27, 1989
    Assignee: Sumitono Pharmaceutical Company, Limited
    Inventors: Kikuo Ishizumi, Fujio Antoku, Isamu Maruyama, Atsuyuki Kojima
  • Patent number: 4774165
    Abstract: Disclosed is a direct making of multicolor printing plates by the procedure of exposing a photosensitive material (P) of the lithographic type for making a black plate to an original bearing both the continuous tone image and the line images. The said procedure comprises (1) exposure to the continuous tone image which is performed by exposing the sensitive material (P) through a contact screen to the original in which the line images are covered with a mask (M-1) having an optical reflectance of 2% or less and the continuous tone image is covered with a mask (M-2) having a large optical reflectance, then again exposing, in the absence of contact screen, the sensitive material (P) to the original in which the line images are covered with said mask (M-1), and the mask (M-2) for the continuous tone image is removed, and (2) exposure to the line images which is performed by exposing the sensitive material (P) to the original in which the continuous tone image is covered with the mask (M-1).
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: September 27, 1988
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Kyonosuke Yamamoto, Kazuhito Hasegawa, Masaharu Tatikawa, Kazuyuki Ebara, Isamu Maruyama
  • Patent number: 4745117
    Abstract: A compound of the formula: ##STR1## wherein A is a carbonyl group or a sulfonyl group;B is either one of the formulas: ##STR2## (in which E is a methylene group, an ethylene group or an oxygen atom and a full line accompanying a broken line ( ) indicates a single bond or a double bond), ##STR3## (in which F is a methylene group or an ethylene group and a full line accompanying a broken line ( ) is as defined above) and ##STR4## (in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each a hydrogen atom or a methyl group) when A represents a carbonyl group, or B is a 1,2-phenylene group when A represents a sulfonyl group;D is an ethylene group, an ethenylene group or an ethynylene group, of which one or more may be optionally substituted with hydroxyl; andn is an integer of 0, 1 or 2, or its acid addition salt. These compounds are useful for the treatment or psychosis.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: May 17, 1988
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Kikuo Ishizumi, Fujio Antoku, Isamu Maruyama, Atuyuki Kojima
  • Patent number: 4325886
    Abstract: A process for the optical resolution of DL-.alpha.-methyl-.beta.-acylthiopropionic acid, which comprises contacting a DL-.alpha.-methyl-.beta.-acylthiopropionic acid of the formula, ##STR1## wherein R.sub.1 is acetyl or benzoyl which may be substituted with a C.sub.1 -C.sub.3 alkyl or a halogen atom, with an optically active amine of the formula, ##STR2## wherein R.sub.2 is methyl, isopropyl or isobutyl, to form diastereoisomeric salts, subjecting the formed diastereoisomeric salts to the fractional crystallization in a solvent to separate the D-acid salt from the L-acid salt, and then contacting the individual diastereoisomeric salt with acid to give D-.alpha.-methyl-.beta.-acylthiopropionic acid and L-.alpha.-methyl-.beta.-acylthiopropionic acid, the former being useful as an intermediate for synthesizing captopril useful as an antihypertensive agent.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: April 20, 1982
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Naohito Ohashi, Hiroyuki Mizote, Isamu Maruyama, Shoji Nagata, Kikuo Ishizumi, Junki Katsube
  • Patent number: 4230706
    Abstract: Quinazoline compounds of the formula: ##STR1## wherein A is ##STR2## wherein n is an integer of 1 or 2, or ##STR3## wherein X is O or CH.sub.2, and n and m are independently an integer of 1 or 2, and its non-toxic pharmaceutically acceptable salts, having an excellent antihypertensive activity without causing adverse effects such as orthostatic hypotension.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: October 28, 1980
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Shunji Aono, Junki Katsube
  • Patent number: 4148796
    Abstract: Novel .gamma.-piperidinobutyrophenone derivatives of the formula, ##STR1## wherein R.sup.1 is halogen, amino, alkanoylamino, alkylamino or N-(alkanoyl)alkylamino;R.sup.2 is hydrogen or halogen, provided that when R.sup.1 is halogen, R.sup.2 must be halogen; andZ is a piperidino group having the formula (A), ##STR2## (wherein each of R.sub.a and R.sub.b is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl; R.sup.3 is hydrogen or hydroxyl; and n is 1 or 2), or a piperidino group having the formula (B), ##STR3## (wherein R.sub.c is hydrogen or lower alkyl; and each of R.sub.d and R.sub.e is hydrogen, halogen, lower alkyl or lower alkoxy), provided that when R.sup.1 is amino and R.sup.2 is hydrogen, Z cannot be represented by the formula (A), and their pharmaceutically acceptable acid addition salts, which are useful as psychotropic, neuroleptic or analgesic agents.
    Type: Grant
    Filed: August 15, 1973
    Date of Patent: April 10, 1979
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Masaru Nakao, Kikuo Sasajima, Isamu Maruyama, Shigenari Katayama
  • Patent number: 4102783
    Abstract: An adsorbent used for effectively collecting or removing oily materials floating on water or emulsified or dispersed in water composed mainly of unrefined lints or unrefined linters together with, if necessary, filter papers, synthetic fibers, or natural fibers as a mixture thereof.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: July 25, 1978
    Assignee: Daicel Ltd.
    Inventors: Akira Zenno, Toshiaki Uebayashi, Isamu Maruyama, Hidehiro Shiono
  • Patent number: 4080328
    Abstract: Novel N-substituted heterocyclic derivatives represented by the formula, ##STR1## wherein R is hydrogen or lower alkanoyl; R.sub.1 is hydrogen, lower alkyl, lower alkoxy, halogen, nitro, trifluoromethyl, amino or N-lower alkanoylamino; R.sub.2 is hydrogen, halogen, amino or N-lower alkanoylamino; W is oxygen, sulfur, sulfinyl or sulfonyl; and Y is ##STR2## (wherein R.sub.3 is hydrogen, lower alkyl or lower alkanoyl; and R.sub.4 is hydrogen, halogen or lower alkyl), and pharmaceutically acceptable salts thereof, which have excellent anti-inflammatory, analgesic, sedative, anti-convulsive or anti-hypertensive activities.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: March 21, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Izumi Yanagihara, Hisao Yamamoto
  • Patent number: 4079053
    Abstract: Novel 1-substituted benzodiazepine derivatives and salt thereof having the formula, ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, a nitro group, a cyano group, a lower alkoxy group or a trifluoromethyl group; R.sub.2 is a pyridyl group or a group of the formula ##STR2## wherein R.sub.5 and R.sub.6 represent individually a hydrogen atom, a halogen atom, a lower alkyl group or a trifluoromethyl group); R.sub.3 is a hydrogen atom or a lower alkyl group; R.sub.4 is a lower alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl group; m is 1 or 2; and n is an integer of 1 to 4, and a process for preparation thereof and pharmaceutical use of the same.The benzodiazepine derivatives are effective as tranquillizers, muscle-relaxants and hypnotics.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: March 14, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Shigeho Inaba, Toshiyuki Hirohashi, Michihiro Yamamoto, Kikuo Ishizumi, Mitsuhiro Akatsu, Isamu Maruyama, Kazuo Mori, Yoshiharu Kume, Takahiro Izumi
  • Patent number: 4065565
    Abstract: Acylhydrazone compounds having excellent pyschotropic activity which are represented by the formula: ##STR1## wherein Z is selected from the groups having the formulas: ##STR2## wherein n is an integer of from 0 to 2 and R.sup.1 -R.sup.12 are as defined hereinbelow.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: December 27, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Sasajima, Keiichi Ono, Masaru Nakao, Isamu Maruyama, Shigenari Katayama, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4017624
    Abstract: An N-(.omega.-amino)alkylaniline derivative of the formula: ##STR1## and its pharmaceutically acceptable salts, which are useful as neuroleptic agents and can be prepared by reacting a compound of the formula: ##STR2## with a compound of the formula:H--A[wherein R is hydrogen, C.sub.1 -C.sub.7 alkyl, C.sub.1 -C.sub.7 alkanoyl or aroyl, R.sub.1 is hydrogen, halogen, C.sub.1 -C.sub.7 alkyl or C.sub.1 -C.sub.7 alkoxy,A is ##STR3## (wherein R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.7 alkyl, C.sub.1 -C.sub.7 alkoxy or trifluoromethyl), ##STR4## (wherein R.sub.2 is as defined above and R.sub.3 is hydrogen, C.sub.1 -C.sub.7 alkyl or C.sub.1 -C.sub.7 alkanoyl), ##STR5## (wherein R.sub.2 is as defined above or ##STR6## (wherein R.sub.2 and R.sub.3 are each as defined above) and n is 2, 3 or 4].
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: April 12, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4017621
    Abstract: Novel tricyclic compounds of the formula: ##STR1## wherein A is --CH.sub.2 --CH.sub.2 --, --CH=CH-- or ##STR2## X is hydrogen, halogen, nitro, trifluoromethyl, C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy, R.sub.1 and R.sub.2 are each hydrogen or C.sub.1 -C.sub.4 alkyl and R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.3 -C.sub.5 alkenyl, C.sub.3 -C.sub.5 alkynyl, C.sub.3 -C.sub.6 cycloalkyl (C.sub.1 -C.sub.3)alkyl, ar(C.sub.1 -C.sub.3)alkyl, polyhalo(C.sub.1 -C.sub.2)alkyl, C.sub.1 -C.sub.4 alkoxy(C.sub.1 -C.sub.3)alkyl or hydroxy(C.sub.1 -C.sub.3)alkyl, and non-toxic salts thereof which are useful as antidepressants and can be prepared by reduction of a compound of the formula: ##STR3## wherein A, X, R.sub.1, R.sub.2 and R.sub.3 are each as defined above.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: April 12, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshinori Takashima, Isamu Maruyama, Junki Katsube
  • Patent number: 4012514
    Abstract: Novel olefinic aryl ketone compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, halogen, C.sub.1-4 alkyl, or C.sub.1-4 alkoxy, R.sup.2 is hydrogen or halogen, and X is a group of the formula: ##STR2## and their non-toxic salts, which possess various useful pharmacological activities and can be produced by reaction of an acetylenic alcohol of the formula: ##STR3## wherein R.sup.1 and R.sup.2 are each as defined above with formaldehyde and an piperidine compound of the formula: , or its non-toxic salt; reduction of the resultant acetylenic aryl alcohol; and oxidation of the resultant olefinic aryl alcohol.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: March 15, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Junki Katsube, Masaru Nakao, Kikuo Sasajima, Isamu Maruyama, Masaharu Takayama, Keiichi Ono, Shigenari Katayama, Yoshihiro Tanaka, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4012515
    Abstract: Novel olefinic aryl ketone compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, halogen, C.sub.1.sub.-4 alkyl, or C.sub.1.sub.-4 alkoxy, R.sup.2 is hydrogen or halogen, and R.sup.3 and R.sup.4 are each hydrogen, halogen, C.sub.1.sub.-4 alkyl or trifluoromethyl, and their non-toxic salts, which possess various useful pharmacological activities and can be produced by reaction of an acetylenic alcohol of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above, with formaldehyde and an amine of the formula: ##STR3## wherein R.sup.3 and R.sup.4 are each as defined above; reduction of the resultant acetylenic aryl alcohol; and oxidation of the resultant olefinic aryl alcohol.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: March 15, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Junki Katsube, Masaru Nakao, Kikuo Sasajima, Isamu Maruyama, Masaharu Takayama, Keiichi Ono, Shigenari Katayama, Yoshihiro Tanaka, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4010280
    Abstract: A phenoxyalkylamine derivative of the formula: ##STR1## and its pharmaceutically acceptable salts, which are useful as neuroleptic agents and a process for their preparation by reacting a compound of the formula: ##STR2## with a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 are each hydrogen, halogen, C.sub.1 -C.sub.7 alkyl or C.sub.1 -C.sub.7 alkoxy, X is oxygen, sulfur, sulfinyl or NR (in which R is hydrogen or C.sub.1 -C.sub.7 alkyl), m and n are each an integer of 2, 3 or 4, and Y and Y' are each amino or halogen but they are different from each other.
    Type: Grant
    Filed: September 27, 1974
    Date of Patent: March 1, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4010154
    Abstract: Novel 1-substituted benzodiazepine derivatives and salt thereof having the formula, ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, a nitro group, a cyano group, a lower alkoxy group or a trifluoromethyl group; R.sub.2 is a pyridyl group or a group of the formula ##STR2## wherein R.sub.5 and R.sub.6 represent individually a hydrogen atom, a halogen atom, a lower alkyl group or a trifluoromethyl group); R.sub.3 is a hydrogen atom or a lower alkyl group; R.sub.4 is a lower alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl group; m is 1 or 2; and n is an integer of 1 to 4, and a process for preparation thereof and pharmaceutical use of the same.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: March 1, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Shigeho Inaba, Toshiyuki Hirohashi, Michihiro Yamamoto, Kikuo Ishizumi, Mitsuhiro Akatsu, Isamu Maruyama, Kazuo Mori, Yoshiharu Kume, Takahiro Izumi
  • Patent number: 4009173
    Abstract: Novel butyrophenone derivatives of the formula: ##STR1## wherein R.sub.1 represents a hydroxyl group or ##STR2## (wherein R.sub.6 and R.sub.7 are each a hydrogen atom or a lower alkyl group or, when taken together with the adjacent nitrogen atom, may form a heterocyclic group), R.sub.2 represents an optionally substituted phenyl group or ##STR3## (wherein R.sub.8 and R.sub.9 are each a hydrogen atom or a lower alkyl group or, when taken together with the adjacent nitrogen atom, may form a heterocyclic group), R.sub.4 represents a hydrogen atom, a lower alkyl group or an optionally substituted phenyl group, R.sub.5 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a trifluoromethyl group, R.sub.10 represents a hydrogen atom or an acyl group represented by R.sub.3 CO- (wherein R.sub.3 is a hydrogen atom, a lower alkyl group or an optionally substituted phenyl group) and Z represents two hydrogen atoms or an oxygen atom, provided that when Z is an oxygen atom and R.sub.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: February 22, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Sasajima, Masaru Nakao, Isamu Maruyama, Keiichi Ono, Shigenari Katayama, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4009275
    Abstract: Phenoxypropylamine derivatives of the formula: ##STR1## (in which R.sub.2 is a halogen atom or a trifluoromethyl group) and R.sub.1 is a halogen atom or a C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl group, and their pharmaceutically acceptable salts, which are useful as neuroleptic agents and can be prepared by reacting a compound of the formula: ##STR2## wherein X is a halogen atom and R.sub.1 is as defined above with a compound of the formula:H-Ywherein Y is as defined above.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: February 22, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto