Patents by Inventor Keiji Fujioka

Keiji Fujioka 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: 4855134
    Abstract: A sustained-release preparation of indomethacin or interferon comprising the active ingredient in admixture with a pharmaceutically acceptable biodegradable carrier, particularly a carrier selected from collagen, gelatin, and a mixture thereof. The preparation is particularly suitable for parenteral administration and can release the active ingredient in an effective amount for a long period of time.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: August 8, 1989
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Yoshiya Yamahira, Keiji Fujioka, Shigeji Sato
  • Patent number: 4849141
    Abstract: A method for preparing a sustained release formulation utilizing collagen and/or gelatin as a carrier, which comprises the steps:(i) preparing a uniform and high concentrated mixture with respect to the collagen and/or gelatin by blending an active ingredient, said collagen and/or gelatin, and water or an admixture consisting of water and a hydrophilic organic solvent under one of the conditions selected from:(A) the pH of the mixture is kept below 5 and the salt concentration of the mixture is retained below fiber-forming concentration;(B) chemically modified collagen and/or gelatin is employed; and(C) glucose is added to the mixture;(ii) molding the resultant mixture; and(iii) gradually eliminating the solvent from the molded product.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: July 18, 1989
    Assignees: Sumitomo Pharmaceuticals Company, Limited, Koken Co., Ltd.
    Inventors: Keiji Fujioka, Shigeji Sato, Yoshio Sasaki, Teruo Miyata, Masayasu Furuse, Hiromi Naito
  • Patent number: 4774091
    Abstract: A solid sustained-release preparation in the form of a needle-like or bar-like shape, which consists essentially of an active ingredient and a pharmaceutically acceptable biodegradable carrier (e.g. proteins, preferably collagen, gelatin, and a mixture thereof). The sustained-release preparation can be administered to the body or implanted into the body by injection or an injection-like method and can release the active ingredient at an effective level for a long period of time when administered.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: September 27, 1988
    Assignee: Sumitomo Pharmaceuticals Company, Ltd.
    Inventors: Yoshiya Yamahira, Keiji Fujioka, Shiegeji Sato, Yoshihiro Takada
  • Patent number: 4582845
    Abstract: A pharmaceutical composition is provided herein containing as a key ingredient 4-carbamoyl-imidazolium-5-oleate of the formula (I) ##STR1## its salt or hydrate thereof, and one or more of a sulfur compound capable of producing at least one of the ions selected from HSO.sub.3.sup.--, SO.sub.3.sup.2-- and S.sub.2 O.sub.5.sup.2--. The sulfur compounds prevent discoloration of the composition.The stabilization against coloration is further enhanced by the presence of L-cysteine hydrochloride. The solubility of the compound (I) can be further enhanced by the presence of a basic substance. The active ingredient is known as a therapeutic agent for the treatment of such diseases as rheumatism and nephritis.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: April 15, 1986
    Assignee: Sumitomo Pharmaceuticals Co., Ltd.
    Inventors: Yoshiya Yamahira, Keiji Fujioka
  • Patent number: 4352793
    Abstract: A composition comprising as the pharmaceutically active ingredient bencyclane fumarate and cyclodextrin.As compared with prior bencyclane fumarate preparations, this composition can greatly decrease the adverse effects of bencyclane fumarate and, in addition, offers considerable advantages from the viewpoints of method of use and method of production of preparation.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: October 5, 1982
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshiya Yamahira, Takeshi Noguchi, Keiji Fujioka, Tetsuo Noguchi, Shigeji Sato
  • Patent number: 4253512
    Abstract: A low pressure cordless and tubeless tire is provided in the vicinity of the widest portion of the tire body with annular reinforcement ribs extending continuously or discontinuously along the entire circumference of the tire body at the side walls. Adjacent the first annular ribs are second annular ribs located between the side walls and the shoulder region of the tread section. The first and second ribs at each side wall define an annular groove therebetween.
    Type: Grant
    Filed: September 25, 1979
    Date of Patent: March 3, 1981
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Ohtsu Tire Kabushiki Kaisha
    Inventors: Tomoaki Yoshioka, Keiji Fujioka
  • Patent number: 4244943
    Abstract: A method for preparing a stable urokinase injection by the liophilization of urokinase which comprises liophilizing an aqueous solution containing urokinase, human serum albumin and one or more amino acid compounds selected from polar amino acids and salt thereof. The urokinase injection obtained according to this method is excellent in the storing stability as compared with conventional urokinase preparations for injection.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: January 13, 1981
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshiya Yamahira, Keiji Fujioka, Yoshiko Okuzawa, Seiko Miura, Shigeji Sato
  • Patent number: 4226769
    Abstract: A process for freeze-drying a penicillin derivative of the formula: ##STR1## wherein R is a hydrogen atom or a hydroxyl group, by evaporating a frozen aqueous solution of the penicillin derivative (I) under vacuum from the frozen state to dryness, which is characterized by maintaining the temperature of the frozen solution within a range from the eutectic point of the solution determined by the electric resistance method to -8.degree. C. when the penicillin derivative of the formula (I) wherein R is a hydrogen atom is to be freeze-dried, or -10.degree. C. when the penicillin derivative of the formula (I) wherein R is a hydroxyl group is to be freeze-dried during the primary drying period of the drying process.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: October 7, 1980
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Terutsugu Tsuji, Shigeji Sato, Keiji Fujioka, Yoshiya Yamahira, Tadao Maeda