Patents by Inventor Kazumasa Yokoyama

Kazumasa Yokoyama 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: 4613505
    Abstract: There is provided a fat emulsion of an ester of flurbiprofen having the formula ##STR1## wherein R is a group of the formula ##STR2## wherein R.sub.1 is a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group, R.sub.2 is a C.sub.1 -C.sub.15 alkyl group or a C.sub.2 -C.sub.8 alkenyl group, and m is zero or an integer of 1; or a lactone group of the formula ##STR3## wherein R.sub.3 and R.sub.4 are same as or different from each other and are a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group, and n is an integer of 1 or 2.The emulsion containing particles of a vegetable oil dissolving the ester can be orally or parenterally administered to human or animal for analgesia, antiphlogosis and antipyresis in various diseases and exhibits a high activity with small amounts in terms of flurbiprofen as compared with flurbiprofen itself.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: September 23, 1986
    Assignees: The Green Cross Corporation, Kaken Pharmaceutical Co., Ltd.
    Inventors: Yutaka Mizushima, Katsuhiro Uchida, Shozoh Masumoto, Masao Tohno, Yoshinobu Hashimoto, Kazumasa Yokoyama, Hiroyuki Okamoto, Kiichiro Nabeta, Tadakazu Suyama
  • Patent number: 4613605
    Abstract: A novel compound of the formula, ##STR1## wherein k is zero or an integer of 1 to 2, j is an integer of from 1 or 3, l and m are each zero or an integer of from 1 to 3, and n is an integer of from 1 to 4, the rings A, B and C being optionally substituted with at least one trifluoromethyl group or tetrafluoroethyl group is prepared by reacting the perhydro compound corresponding thereto with fluorine. The compound is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: September 23, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4605786
    Abstract: A perfluoroether compound having the following formula is useful as a thermostable, inert solvent and inter alia as an oxygen carrier in an artificial blood or infusion fluid. ##STR1## wherein Rf.sub.1 and Rf.sub.2 are different from each other and are selected from the group of a C.sub.1 or C.sub.3 perfluoroalkyl group which may be interrupted by an oxygen atom, and a C.sub.5 -C.sub.7 perfluorocycloalkyl group, and n and n' are zero or an integer of 1; one of Rf.sub.1 and Rf.sub.2 being the C.sub.5 -C.sub.7 perfluorocycloalkyl group and the total number of carbon atoms being 9-11 inclusive.
    Type: Grant
    Filed: December 20, 1983
    Date of Patent: August 12, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Yoshihisa Inoue, Taizo Ono, Chikara Fukaya, Yoshio Arakawa, Youichiro Naito, Koichi Yamauchi, Tadakazu Suyama
  • Patent number: 4605650
    Abstract: A novel compound of the formula, ##STR1## wherein k is zero or an integer of 1 to 2, j is an integer of from 1 to 3, l and m are each zero or an integer of from 1 to 3, and n is an integer of from 1 to 4, the rings A, B and C being optionally substituted with at least one trifluoromethyl group or tetrafluoroethyl group is prepared by reacting the perhydro compound corresponding thereto with fluorine. The compound is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: August 12, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4604385
    Abstract: A novel compound of the formula, ##STR1## wherein k is zero or an integer of 1 to 2, j is an integer of from 1 or 3, l and m are each zero or an integer of from 1 to 3, and n is an integer of from 1 to 4, the rings A, B and C being optionally substituted with at least one trifluoromethyl group or tetrafluoroethyl group is prepared by reacting the perhydro compound corresponding thereto with fluorine. The compound is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: August 5, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4599343
    Abstract: A perfluorobicyclo compound of the general formula: ##STR1## wherein either or both of Ring A and Ring B may optionally be substituted with lower perfluoroalkyl group(s) and m and n each represent 3 or 4.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 8, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4596810
    Abstract: A perfluorobicyclo compound of the general formula: ##STR1## wherein either or both of Ring A and Ring B may optionally be substituted with lower perfluoroalkyl group(s) and m and n each represent 3 or 4.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 24, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4591599
    Abstract: A perfluorobicyclo compound of the general formula: ##STR1## wherein either or both of Ring A and Ring B may optionally be substituted with lower perfluoroalkyl group (s) and m and n each represent 3 or 4.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: May 27, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4591593
    Abstract: A novel compound of the formula, ##STR1## wherein R denotes a lower perfluoroalkyl group l is an integer of 3 or 4, n+m is an integer of 2 or 3, provided that n may be zero, and at least one of ring A and ring B may be substituted by a lower perfluoroalkyl group, prepared by reacting the corresponding perhydro compound with fluorine is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: November 17, 1982
    Date of Patent: May 27, 1986
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Isuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4587122
    Abstract: The drug such as antitumor agents or antibiotics can preferentially be carried to a morbid part, for example, injured tissue and tumor site by administering its complex with fibronectin combined through an oxidized dextran to repair the morbid part. The complex is prepared by reacting the drug, an oxidized dextran having a cleaved structure of aldohexopyranose ring, and fibronectin.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: May 6, 1986
    Assignee: The Green Cross Corporation
    Inventors: Yoshio Kagitani, Yasuo Ueda, Kozi Munechika, Satoshi Morimoto, Shirou Komeda, Kenji Tanaka, Kazumasa Yokoyama
  • Patent number: 4542147
    Abstract: A novel compound of the formula, ##STR1## wherein k is zero or an integer of 1 to 2, j is an integer of from 1 to 3, l and m are each zero or an integer of from 1 to 3, and n is an integer of from 1 to 4, the rings A, B and C being optionally substituted with at least one trifluoromethyl group or tetrafluoroethyl group is prepared by reacting the perhydro compound corresponding thereto with fluorine. The compound is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: September 17, 1985
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4535085
    Abstract: A perfluorotricyclic amine compound which is usable as an oxygen carrier in an artificial blood, represented by the general formula ##STR1## wherein R denotes a perfluoroalkyl group having 1-4 carbon atoms; the ring A denotes a five- or six-membered ring, the ring B denotes a five-, six- or seven-membered ring, the ring C denotes a five- or six-membered ring any one of the rings A, B and C optionary being substituted by one or more lower perfluoroalkyl group in addition to the above-mentioned substituent R; and further f, g, h, i, j and k denote integers appropriately selected to construct the above-mentioned size of rings A, B, and C; is prepared by reacting the corresponding perhydrotricyclic amine with fluorine.
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: August 13, 1985
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4534978
    Abstract: Perfluorocycloamines represented by the general formula: ##STR1## wherein either or both of ring A and ring B may be substituted with lower perfluoroalkyl group(s), m and n are independently 4, 5, or 6 and Z is a perfluoroalkylene group or a mere bond.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: August 13, 1985
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4530926
    Abstract: A novel compound of the formula, ##STR1## wherein k, j, l and m are zero or an integer of from 1 to 3, and n is an integer of from 1 to 3, the rings A, B and C being optionally substituted with at least one trifluoromethyl group, prepared by reacting the corresponding perhydro compound with fluorine is useful as a material capable of carrying oxygen in an aqueous emulsion for lifesaving a patient suffering from massive hemorrhage and for preserving internal organs in transplantation.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: July 23, 1985
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4526969
    Abstract: A perfluorobicyclo compound of the general formula: ##STR1## wherein either or both of Ring A and Ring B may optionally be substituted with lower perfluoroalkyl group(s) and m and n each represent 3 or 4.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: July 2, 1985
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Tadakazu Suyama
  • Patent number: 4493847
    Abstract: A fat emulsion for injection containing prostaglandin E.sub.1 which has a vasodilative action as well as a hypotensive action and a method for the production of such an emulsion. The present emulsion is effective in treating chronic arteriostenosis diseases.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: January 15, 1985
    Assignees: Taisho Pharmaceutical Co., Ltd., The Green Cross Corporation
    Inventors: Yutaka Mizushima, Hironaka Aihara, Susumu Otomo, Kazumasa Yokoyama, Hiroyuki Okamoto, Tadakazu Suyama
  • Patent number: 4425347
    Abstract: A perfluorobicyclo compound emulsion preparation having oxygen carrying ability containing a perfluorobicyclo compound of the general formula: ##STR1## wherein R represents a perfluoromethyl group or perfluoroethyl group, as an oxygen carrying component.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: January 10, 1984
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4423061
    Abstract: A perfluorocycloamine emulsion preparation having oxygen carrying ability containing a perfluorocycloamine of the general formula: ##STR1## wherein any position may optionally be substituted with a perfluoromethyl group as an oxygen carrying component.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: December 27, 1983
    Assignee: The Green Cross Corporation
    Inventors: Kazumasa Yokoyama, Chikara Fukaya, Yoshio Tsuda, Taizo Ono, Yoshio Arakawa, Yoshihisa Inoue, Youichiro Naito, Tadakazu Suyama
  • Patent number: 4340594
    Abstract: A fat emulsion containing a steroid having an anti-inflammatory activity, comprising an effective quantity of a steroid having an anti-inflammatory activity, 5 to 50% (W/V) of soybean oil, a phospholipid in a weight ratio of 1-50 to 100 of said soybean oil, and a proper quantity of water. This fat emulsion exhibits a long-lasting activity in the region of inflammation and is especially useful in the therapeutic or prophylactic treatment of rheumatism, immunological hemolytic anemia, idiopathic thrombocytopenic purpura, and Paget disease, or in conjunction with kidney transplantation.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: July 20, 1982
    Assignee: The Green Cross Corporation
    Inventors: Yutaka Mizushima, Kazumasa Yokoyama, Kiichiro Nabeta, Noboru Yamada, Tadakazu Suyama
  • Patent number: 4280996
    Abstract: A stable fat emulsion having low side effects, which is suitable as nutritive infusion fluid for intravenous injection, is provided. The emulsion contains 5-50 (W/V) % of soybean oil, yolk phospholipids in a weight ratio to the soybean oil of 1/4-1/25, 0.01-0.30 (W/V) % of a fatty acid or salt thereof having 12-20 carbon atoms and the balance of water.
    Type: Grant
    Filed: September 13, 1979
    Date of Patent: July 28, 1981
    Assignee: The Green Cross Corporation
    Inventors: Hiroyuki Okamoto, Yoshio Tsuda, Kazumasa Yokoyama