Patents by Inventor Akihiko Ikegawa

Akihiko Ikegawa 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: 20080260661
    Abstract: The invention relates to the use of an UV-absorbing compound for the preparation of a cosmetic composition for protection against UV radiation said compound being represented by the general formula (I) wherein less than 10% of the total absorption between 250 and 600 nm of said UV-absorbing compound according to formula (I) is above 400 nm. The invention also relates to sunscreen compositions comprising the UV-absorbing compound according to formula (I).
    Type: Application
    Filed: August 10, 2005
    Publication date: October 23, 2008
    Inventors: Sebastianus Gerardus Johannes Maria Kluijtmans, Akihiko Ikegawa, Jan Bastiaan Bouwstra
  • Publication number: 20070274983
    Abstract: The present invention provides a method and composition for the treatment and/or prevention of infection, said method comprising orally administering a composition to a mammal, said composition comprising a galactose containing indigestible oligosaccharide and immunoglobulin from the milk or colostrum of hyperimmunized cows.
    Type: Application
    Filed: August 24, 2005
    Publication date: November 29, 2007
    Inventors: Sebastianus Gerardus Kluijtmans, Akihiko Ikegawa, Jan Bouwstra
  • Patent number: 7244859
    Abstract: The invention is a method for producing ?-aminopentadienoate derivatives of formula (1), the method comprising reacting a streptocyanine derivative of formula (2) with an ester derivative of formula (3) in the presence of an organic base.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: July 17, 2007
    Assignee: Fujifilm Corporation
    Inventors: Akihiko Ikegawa, Masuji Motoki, Katsuyoshi Yamakawa
  • Patent number: 6713473
    Abstract: A compound represented by the formula (I) [A represents a 5- to 7-membered hydrocarbon ring group; L represents —NR3—CO—, —CO—NR3— and the like (R3 represents a hydrogen atom, a lower alkyl group, a lower acyl group and the like); M represents an alkylene linking group (a carbon atom constituting the carbon chain may be replaced with a nitrogen atom, an oxygen atom and the like); X represents —S—, —O—, —NR4—, —NR5—CO— and the like (R4 and R5 represent a hydrogen atom, a lower alkyl group and the like) or a single bond; Y represents an alkyl group, an aryl group, an amino group, an aromatic heterocyclic group and the like; R1 represents a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a lower acyl group; and R21, R22 and R23 represent a hydrogen atom, a hydroxyl group, a lower alkyl group and the like] or a salt thereof.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: March 30, 2004
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Naoyuki Nishikawa, Masaharu Sugai, Kozo Aoki, Makoto Suzuki, Akihiko Ikegawa, Kazunobu Takahashi, Fukuichi Ohsawa, Naomi Masuda, Nobukazu Kakui, Jiro Tanaka, Yuji Tabata, Kenji Asai
  • Publication number: 20030181483
    Abstract: The invention is a method for producing &dgr;-aminopentadienoate derivatives of formula (1), the method comprising reacting a streptocyanine derivative of formula (2) with an ester derivative of formula (3) in the presence of an organic base. In formulae (1) to (3), R1 represents an alkyl group or an aryl group; R2, R3, R4 and R5 independently represent a hydrogen atom or an alkyl group; R2 and R3, or R4 and R5 may bond to each other to form a ring; Y represents an electron attractive group; X represents an acid radical; n indicates 0 or a positive number, which is no more than 5; Y may bond to R1 to form a ring.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 25, 2003
    Inventors: Akihiko Ikegawa, Masuji Motoki, Katsuyoshi Yamakawa
  • Patent number: 5618831
    Abstract: A pharmaceutical composition for treatment of cancer in an animal comprising:(A) a therapeutically effective amount of at least one compound selected from the group consisting of compounds represented by the General Formula (I). ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents an atomic group necessary to form a 5- or 6-membered ring;R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents an alkyl group or an aryl group;L.sub.1 and L.sub.2 each represents a methine group or a substituted methine group;X represents a pharmaceutically acceptable anion;k represents a number necessary for electrical charge balance;n represents 0 or 1; and(B) a pharmaceutically acceptable carrier or diluent.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: April 8, 1997
    Assignees: Fuji Photo Film Co., Ltd., Dana Farber Cancer Institute
    Inventors: Tadao Shishido, Masayuki Kawakami, Akihiko Ikegawa, Toshinao Ukai, Keizo Koya, Lan B. Chen
  • Patent number: 5604089
    Abstract: There is disclosed a silver halide photographic material in which a residual color can be compatible with a sensitivity in a development processing. The photographic material comprises a support and provided thereon at least one silver halide emulsion layer containing at least one of the methine compounds represented by the following Formula (I) and at least one of the compounds represent-ed by the following Formula (II): ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sup.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5, or --(CR.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6, in which R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent an alkyl group, an alkoxy group, or an amino group and r, s, t and u each repre-sent an integer of 1 to 5; R.sup.2 is synonymous with R.sup.1 or represents an alkyl group which is different from R.sup.1 ; Z.sup.1 and Z.sup.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: February 18, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Yuji Mihara
  • Patent number: 5476945
    Abstract: A methine compound represented by the following formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2 each represent a non-metallic atomic group necessitated for forming a five-membered or six-membered, nitrogen-containing heterocyclic ring, R.sub.1 and R.sub.2 each represent an alkyl group, X represents an inorganic anion, k represents a number necessitated for adjusting the electric charge of the molecule to zero, and n represents 0 or 1; with the proviso that when n is 1, the five-membered or six-membered, nitrogen-containing heterocyclic ring formed by Z.sub.2 is cationic, k is not zero and X represents chloride ion. The compound is useful as a spectral sensitizing dye and an antitumor agent.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: December 19, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Toshinao Ukai, Masayuki Kawakami
  • Patent number: 5437972
    Abstract: Disclosed is a novel silver halide photographic material comprising a support having thereon (a) a layer containing at least one methine compound represented by the following general formula (I) and (b) a layer containing at least one methine compound represented by the following general formula (II), (III), (IV) or (V): ##STR1## wherein the variables in the formulas are defined in the detailed description. In a preferred embodiment, the silver halide photographic material comprises at least one methine compound represented by general formula (I) and at least one methine compound represented by general formula (II) or (V) in the same layer.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: August 1, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Masayuki Kuramitsu, Masaki Okazaki
  • Patent number: 5422238
    Abstract: A novel silver halide photographic material comprising at least one methine compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sup.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5 or --(CH.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6 in which R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents an alkyl group, alkoxy group or amino group, r, s, t and u each represents an integer 1 to 5; and R.sup.2 represents has the same meaning as R.sup.1 or represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group required to form a 5- or 6-membered heterocyclic group; p and q each represents an integer 0 or 1; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; m represents an integer 0 to 2; X represents an anion; and k represents an integer required to adjust the charge in the molecule to 0.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: June 6, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Masayuki Kuramitsu, Masaki Okazaki
  • Patent number: 5391475
    Abstract: Disclosed is a silver halide color photographic photosensitive material in which the spectral sensitivity in the green short wavelength region is increased and which has excellent storage stability. The photosensitive material is sensitized by a selenium sensitizer represented by formula (I). Also, a green light sensitive photosensitive silver halide emulsion layer has been spectrally sensitized with a sensitizing dye represented by formula (II).
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: February 21, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junji Nishigaki, Fumitaka Ueda, Akihiko Ikegawa
  • Patent number: 5384234
    Abstract: The present invention provides a silver halide color photographic photosensitive material which has high saturation, excellent color reproduction and excellent graininess, the material comprising a silver halide emulsion layer which imparts an interlayer effect to a red sensitive silver halide emulsion layer is spectrally sensitized with a sensitizing dye represented by formula (I) and contains a development inhibitor releasing compound represented by formula (II).
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: January 24, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumitaka Ueda, Junji Nishigaki, Akihiko Ikegawa
  • Patent number: 5364755
    Abstract: A silver halide photographic light-sensitive material have at least one silver halide emulsion layer on a support, wherein at least one of the silver halide emulsion layers comprises an emulsion subjected to chemical sensitization with a selenium compound and spectral sensitization with at least one type of a methine compound represented by Formula (I) below: ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sub.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5, or --(CH.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6 ; R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each represent an alkyl group, an alkoxy group, or an amino group; R.sup.2 has the same meaning as R.sup.1 or represents an alkyl group; Z.sup.1 and Z.sup.2 each represent a nonmetal atom group required to form a 5- or 6-membered heterocyclic ring; each of L.sub.1, L.sub.2, and L.sub.3 represents a methine group; X.sub.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: November 15, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Miyamoto, Akihiko Ikegawa
  • Patent number: 5338656
    Abstract: Disclosed is a silver halide photographic material comprising at least one compound (merocyanine dye) represented by the following general formula (I): ##STR1## wherein Z represents nonmetal atoms necessary to complete a 5- or 6-membered heterocyclic ring; X represents non-metal atoms necessary to complete a 5- or 6-membered acidic nucleus; R.sup.2 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sup.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5 or --(CH.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6 ; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent an alkyl group, an alkoxy group or an amino group; r, s, t and u each represent an integer from 1 to 5; R.sup.1 has the same meaning as R.sup.2 or represents an alkyl group substituted by a sulfo or carboxyl group; p represents 0 or 1; L.sub.1 and L.sub.2 each represent a methine group; and n represents 0, 1, 2 or 3.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: August 16, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Yuji Mihara, Masaki Okazaki
  • Patent number: 5310645
    Abstract: Disclosed is a novel silver halide photographic material is provided comprising a support having thereon (a) a layer containing at least one methine compound represented by the following general formula (I) and (b) a layer containing at least one methine compound represented by the following general formula (II), (III), (IV) or (V): ##STR1## wherein the variables in the formulas are defined in the detailed description. In a preferred embodiment, the silver halide photographic material comprises at least one methine compound represented by general formula (I) and at least one methine compound represented by general formula (II) or (V) in the same layer.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: May 10, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Masayuki Kuramitsu, Masaki Okazaki
  • Patent number: 5308748
    Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one light emulsion layer containing (A) at least one of the methine compounds represented by the following formula (I) and (B) at least one of the methine compounds represented by the following formula (II) or (III): ##STR1## wherein Z.sup.1, Z.sup.2, R.sup.1, R.sup.2, L.sub.1 -L.sub.8, p, q, k.sub.1 -k.sub.3, n.sub.1 -n.sub.3 and X.sub.1 -X .sub.3 are as defined in the specification.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: May 3, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Masayuki Kuramitu, Masaki Okazaki
  • Patent number: 5294532
    Abstract: Disclosed is a silver halide photographic material for medical use, in which the coated amount of silver per surface of the support is 2.8 g/m.sup.2 or less, the silver halide grains in the coated silver halide emulsion layer have a silver chloride content of 10 to 50 mol %, they contain 10.sup.-8 mol or more, per mol of silver, of an iridium compound and they have been spectrally-sensitized to be sensitive to rays of from 600 to 700 nm wavelength range. The material may be processed by rapid processing and has a high sensitivity and high covering power. Also disclosed is a silver halide photographic material for laser exposure, in which the emulsion contains 10.sup.-8 mol or more, per mol of silver, of an iridium compound and is spectrally-sensitized with a sensitizing dye of formula (III): ##STR1## where V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, V.sub.7 and V.sub.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: March 15, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadashi Ito, Takanori Hioki, Akihiko Ikegawa
  • Patent number: 5290676
    Abstract: Disclosed herein is a silver halide photographic light-sensitive material having at least one silver halide emulsion layer formed on a support. Said light-sensitive material having at least one layer contains a regular silver halide emulsion, a tabular silver halide emulsion containing tabular silver halide grains having an average diameter/average thickness ratio of 2 or more, which occupy 50% or more of the total projected area of all silver halide grains, and a silver halide emulsion containing internal latent-image silver halide grains each chemically sensitized to the depth of less than 0.02 .mu.m from the surface of the grain. Each of these emulsions contains at least one methine compound represented by the following formula (I): ##STR1## where R.sup.1 is --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sub.3 or --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sub.4, where R.sup.3 and R.sup.4 are an alkyl group, r and s are an integer ranging from 1 to 5; R.sup.2 is a sulfoalkyl group; Z.sup.1 and Z.sup.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: March 1, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsurou Nagaoka, Akihiko Ikegawa, Masayuki Kuramitsu
  • Patent number: 5272044
    Abstract: Disclosed is a silver halide photographic material comprising a compound represented by the general formula (I), (II), or a salt thereof or a compound represented by the general formula (III), with these groups being defined as in the specification: ##STR1## also disclosed is a method for the processing of a silver halide photographic material, which comprises processing a silver halide photographic material in the presence of a compound represented by the general formula (I) or (II) or a salt thereof or a compound represented by the general formula (III).
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: December 21, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junji Nishigaki, Akihiko Ikegawa, Masaki Okazaki, Minoru Yamada, Nobuhiko Uchino
  • Patent number: 5213952
    Abstract: A method of forming a direct positive color image by imagewise exposing a photographic material having at least one emulsion layer which contains previously non-fogged internal latent image-type silver halide grains, on a support, followed by color-developing the exposed material during or after fogging thereof, wherein the photographic material contains a color sensitizing dye and at least one compound or salt thereof which satisfies the condition-1 as defined in the specification. With the image formed by the method having an elevated maximum image density with a lowered minimum image density, and with the iamge-forming method displaying extremely excellent color reproducibility.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: May 25, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigeru Kuwashima, Akihiko Ikegawa