Patents by Inventor Yoshiyasu Furukawa

Yoshiyasu Furukawa 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: 10594062
    Abstract: It is aimed to provide a press-fit terminal connection structure in which a board connecting portion of a press-fit terminal is press-fit into a through hole provided in a printed circuit board and which can combine the suppression of scraping of a surface layer and a reduction of a necessary load when the press-fit terminal is inserted into and withdrawn from the through hole and an improvement of a holding force for keeping the press-fit terminal inserted in the through hole. In the press-fit terminal connection structure, the press-fit terminal includes, at least on a surface of the contact point portion, an alloy containing layer mainly containing tin and palladium, and the through hole includes a tin layer on an outermost surface of an inner peripheral surface including at least the contact point portion.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: March 17, 2020
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshimasa Shirai, Yasushi Saitoh, Kingo Furukawa, Tetsuhiko Kawasaki, Masayuki Ookubo, Hajime Watanabe, Yoshiyasu Tsuchiya, Akihiro Kato
  • Publication number: 20190140376
    Abstract: It is aimed to provide a press-fit terminal connection structure in which a board connecting portion of a press-fit terminal is press-fit into a through hole provided in a printed circuit board and which can combine the suppression of scraping of a surface layer and a reduction of a necessary load when the press-fit terminal is inserted into and withdrawn from the through hole and an improvement of a holding force for keeping the press-fit terminal inserted in the through hole. In the press-fit terminal connection structure, the press-fit terminal includes, at least on a surface of the contact point portion, an alloy containing layer mainly containing tin and palladium, and the through hole includes a tin layer on an outermost surface of an inner peripheral surface including at least the contact point portion.
    Type: Application
    Filed: May 11, 2017
    Publication date: May 9, 2019
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshimasa SHIRAI, Yasushi SAITOH, Kingo FURUKAWA, Tetsuhiko KAWASAKI, Masayuki OOKUBO, Hajime WATANABE, Yoshiyasu TSUCHIYA, Akihiro KATO
  • Patent number: 4824848
    Abstract: Novel pyrazolo[3,4-d]pyrimidine derivatives represented by the general formula (I) ##STR1## wherein R.sup.1 is an aryl or heteroaryl group which may be substituted by one to three members selected from the class consisting of halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, nitro, amino, N-C.sub.1-4 alkylamino, N,N-diC.sub.1-4 alkylamino, hydroxy, trifluoromethyl, carbamoyl, N-C.sub.1-4 alkylcarbamoyl and N,N-diC.sub.1-4 alkylcarbamoyl;R.sup.2 is C.sub.1-4 alkyl;R.sup.3 and R.sup.4 are independently hydrogen or C.sub.1-4 alkyl;R.sup.5 is hydrogen, C.sub.1-2 alkyl, C.sub.1-5 alkanoyl or C.sub.1-4 alkoxycarbonyl, the group R.sup.5 being attached at the 1- or 2-position of the pyrazole ring;X is C.sub.1-7 alkylene or a group of the formula:--(CH.sub.2).sub.m --Y--(CH.sub.2).sub.n --whereinm is 2 or 3,n is an integer of 0 to 3,and Y is oxygen, sulfur, imino or N-C.sub.
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: April 25, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takehiko Naka, Yoshiyasu Furukawa, Akinobu Nagaoka
  • Patent number: 4603203
    Abstract: Novel 3-aminopyrazolo[3,4-d]pyrimidine derivatives represented by the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each represents an aliphatic hydrocarbon group; R.sub.3 and R.sub.4 each represents hydrogen, alkyl or acyl; R.sub.5 is alkyl, alkoxycarbonyl or formyl; and the dotted line designates the presence of two double bonds on the pyrazole ring, to which R.sub.5 is linked at either the 1- or 2-position and their salts, are useful for antiinflammatory, analgesic and antipyretic agents.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: July 29, 1986
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Yoshitaka Maki
  • Patent number: 4582847
    Abstract: Compounds of the formula ##STR1## wherein R is lower alkyl, and salts thereof. These compounds have excellent diuretic and antihypertensive actions in mammalian animals and are of use as therapeutic drugs for the treatment of edema and hypertension.
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: April 15, 1986
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Kohei Nishikawa
  • Patent number: 4504662
    Abstract: Isoxazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1 and R.sup.2, respectively, are lower alkyl; R.sup.3 is lower alkyl or acyl; and R.sup.4 is hydrogen, lower alkyl, or acyl have antiflammatory, analgesic and antipyretic activities in mammals and low acute and subacute toxicities, as well. The compounds are particularly useful as an antiinflammatory, analgesic and antipyretic drug.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: March 12, 1985
    Assignee: Takeda Chemical Industries, Ltd.
    Inventor: Yoshiyasu Furukawa
  • Patent number: 4355040
    Abstract: Novel imidazole-5-acetic acid derivatives of the formula: ##STR1## wherein R.sup.1 is lower alkyl, cycloalkyl or, phenyl which may be substituted with one to three of halogen, nitro, amino, mono(lower alkyl)amino, di(lower alkyl)amino, lower alkyl, lower alkoxyl, benzyloxyl or/and hydroxyl; X.sup.1, X.sup.2 and X.sup.3 are each hydrogen, halogen, nitro, amino, lower alkyl, lower alkoxyl, benzyloxyl or hydroxyl; Y is halogen and R.sup.2 is hydrogen or lower alkyl; provided that X.sup.1 is halogen, lower alkyl, lower alkoxyl, benzyloxyl or hydroxyl when R.sup.1 is unsubstituted or substituted phenyl only with one halogen, di(lower alkyl)amino, lower alkyl or lower alkoxyl, and its salts have hypotensive activity.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: October 19, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Shoji Kishimoto, Kohei Nishikawa
  • Patent number: 4340598
    Abstract: Novel imidazole derivatives of the formula: ##STR1## wherein R.sup.1 is lower alkyl or, phenyl-C.sub.1-2 alkyl which may be substituted with halogen or nitro;R.sup.2 is lower alkyl, cycloalkyl or, phenyl which may be substituted with halogen, lower alkyl, lower alkoxyl or di(lower alkyl)amino,one of R.sup.3 and R.sup.4 is of the formula: --(CH.sub.2).sub.n --COR.sup.5 in the formula R.sup.5 is amino, lower alkoxyl or hydroxyl and n is integer of 0, 1 or 2,and the other is hydrogen or halogen;provided that R.sup.1 is lower alkyl or phenethyl when R.sup.3 is halogen, n is 1 and R.sup.5 is lower alkoxyl or hydroxyl, and their salts have hypotensive activity.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: July 20, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Shoji Kishimoto, Kohei Nishikawa
  • Patent number: 4258033
    Abstract: Novel N.sup.2 -substituted phenyl-2,6-diaminonebularines of the formula ##STR1## wherein either one of R.sup.1 and R.sup.2 is carbamoyl which may be substituted or acyl group and the other is hydrogen atom, halogen atom or lower alkoxyl group, and their acid addition salts have an excellent coronary vasodilator action.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: March 24, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Masao Tanabe, Yoshiyasu Furukawa
  • Patent number: 4255565
    Abstract: Compounds of the formula ##STR1## wherein R is a phenyl or cyclohexyl group which may be substituted by halogen, lower alkyl or lower alkoxy, or their acid addition salts, are produced in good yield by reacting a compound of the formula ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3, independently of each other, are a hydroxyl group which may be proctected, which is prepared in 2 or 3 steps from 5-amino-1-.beta.-D-ribofuranosylimidazole-4-carboxamide, with a compound of the formulaR--N.dbd.C.dbd.N--R.sup.4wherein R has the same meaning as defined above and R.sup.4 is hydrogen or the same group as R, and, if necessary, subjecting the resulting compound to a treatment for removal of protective groups on its hydroxyl groups.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: March 10, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Shunsuke Shima, Yoshiyasu Furukawa
  • Patent number: 4225591
    Abstract: Novel N.sup.2 -substituted phenyl-2,6-diaminonebularines of the formula ##STR1## wherein R.sup.1 is halogen, lower alkyl or lower alkoxy and R.sup.2 is hydrogen, halogen, lower alkyl or lower alkoxy, and their acid addition salts have excellent coronary vasodilator action.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: September 30, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Masao Tanabe, Yoshiyasu Furukawa
  • Patent number: 4207324
    Abstract: Novel imidazole derivatives of the formula ##STR1## wherein R.sup.1 is hydrogen, nitro or amino, R.sup.2 is a phenyl, furyl or thieyl group which may be substituted by halogen, lower alkyl, lower alkoxy or di-lower-alkylamino, R.sup.3 is hydrogen or lower alkyl and X is halogen, and their physiologically acceptable salts, have excellent diuretic and hypotensive actions.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: June 10, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Koichi Matsumura, Naoto Hashimoto, Yoshiyasu Furukawa
  • Patent number: 4202975
    Abstract: Isoxazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, respectively, are hydrogen, lower alkyl, cycloalkyl, or aryl which may be substituted by halogen, are useful as antiinflammatory-analgesic drugs, and the industrially feasible production thereof is provided.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: May 13, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji Marumoto, Yoshiyasu Furukawa, Kiyohisa Kawai
  • Patent number: 4129654
    Abstract: Isoxazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 respectively, are hydrogen, lower alkyl, cycloalkyl, or aryl which may be substituted by halogen, are useful as antiinflammatory-analgesic drugs, and the industrially feasible production thereof is provided.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: December 12, 1978
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Ryuji M. Marumoto, Yoshiyasu Furukawa, Kiyohisa Kawai
  • Patent number: 4052391
    Abstract: Novel 3-(disubstituted)aminoisothiazolo[3,4-d]pyrimidines of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are respectively alkyl, alkenyl, aryl, aralkyl or aralkenyl, each of which may be substituted, or R.sup.1 and R.sup.2 form together with the adjacent nitrogen a heterocyclic ring which may be substituted, R.sup.4 is hydrogen or alkyl and X is oxygen or imino with a proviso that when X is imino R.sup.4 is hydrogen, show an eminent adenosine-3',5'-cyclic phosphate phosphodiesterase-inhibitory activity, and exhibit excellent pharmacological actions such as anti-inflammatory and sedative activities.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: October 4, 1977
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Osamu Miyashita
  • Patent number: 3959280
    Abstract: Novel 3-(disubstituted)aminoisothiazolo[3,4-d]-pyrimidines of the formula ##SPC1##Wherein R.sup.1, R.sup.2 and R.sup.3 are respectively alkyl, alkenyl, aryl, aralkyl or aralkenyl, each of which may be substituted, or R.sup.1 and R.sup.2 form together with the adjacent nitrogen a heterocyclic ring which may be substituted, R.sup.4 is hydrogen or alkyl and X is oxygen or imino with a proviso that when X is imino R.sup.4 is hydrogen, show an eminent adenosine-3',5'-cyclic phosphate phosphodiesterase-inhibitory activity, and exhibit excellent pharmacological actions such as antiinflammatory and sedative activities.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: May 25, 1976
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshiyasu Furukawa, Osamu Miyashita