Patents by Inventor Katsusuke Endo

Katsusuke Endo 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: 4612277
    Abstract: An image-receiving element for a silver salt diffusion transfer process is disclosed, wherein the element comprises an image stabilizing agent precursor having an inactive group capable of being removed upon contact with an alkaline processing composition.
    Type: Grant
    Filed: July 11, 1984
    Date of Patent: September 16, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Inagaki, Katsusuke Endo
  • Patent number: 4569899
    Abstract: In a photographic element for a silver salt diffusion transfer process comprising a silver halide light-sensitive element, an image receiving element and a processing element, the improvement wherein the photographic element contains a compound represented by the following general formula (I) or (II) ##STR1## wherein all the symbols are defined in the appended claims. A photographic element for a silver salt diffusion transfer process containing the novel image stabilizing agent has good stability during storage thereof before development processing and provides stable silver images free from discoloration or fading.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: February 11, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Inagaki, Katsusuke Endo
  • Patent number: 4520096
    Abstract: A photographic element for a silver salt diffusion transfer process is described, comprising a silver halide light-sensitive element, an image receiving element and a processing element, the improvement wherein said photographic element contains a compound represented by formula (I) or (II) ##STR1## wherein the R.sub.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: May 28, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsusuke Endo, Yoshio Inagaki
  • Patent number: 4493888
    Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one organic metal complex represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein M represents a divalent metal atom; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms, or R.sup.1 and R.sup.2 may be bonded each other to form a heterocyclic ring together with the nitrogen atom; R.sup.3, represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; and R.sup.4 and R.sup.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: January 15, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsusuke Endo, Eiichi Kato, Nobutaka Ohki, Takatoshi Ishikawa
  • Patent number: 4473635
    Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## Wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, or R.sub.1 and R.sub.2 may be bonded to each other to form a heterocyclic ring together with the nitrogen atom; R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an alkoxy group, an acylamido group, a sulfonamido group, an alkylsulfonamido group or an alkyl group, or R.sub.1 and R.sub.6 or R.sub.2 and R.sub.3 may be bonded to each other to form a 5-membered or 6-membered ring; X represents HPF.sub.6 or HBF.sub.4 ; and n represents an integer from 1 to 3.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: September 25, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Katsusuke Endo, Sigeru Kuwazima, Eiichi Kato, Nobutaka Ohki
  • Patent number: 4246333
    Abstract: A photographic element having on a support at least one silver halide emulsion layer having associated therewith a development inhibitor precursor represented by the formula (I) ##STR1## wherein A is a phenyl group, a substituted phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring; said A splitting together with the sulfur atom in the above molecule from the residue of the molecule to provide a silver halide development inhibitor; R.sup.1 is an alkyl group having 1 to 4 carbon atoms; and R.sup.2 is a cyano group, a carbamoyl group or the group represented by the formula ##STR2## wherein R.sup.3 is an aryl group.
    Type: Grant
    Filed: April 3, 1979
    Date of Patent: January 20, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiharu Fuseya, Yukio Karino, Yoshio Sakakibara, Katsusuke Endo
  • Patent number: 4245028
    Abstract: A photographic light-sensitive sheet for the color diffusion transfer process which comprises a support having thereon at least one light-sensitive silver halide emulsion layer with at least one of said silver halide emulsion layers having associated therewith a compound represented by the following general formula (I): ##STR1## wherein Q represents a cyano group, a trifluoromethyl group or a carbamoyl group represented by the formula --CONR.sup.3 R.sup.4 wherein R.sup.3 represents a hydrogen atom or an alkyl group; R.sup.4 represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group; and R.sup.3 and R.sup.4 may combine directly or through an oxygen atom to form a ring; M represents a hydrogen atom, an alkyl group, an alkoxy group, a sulfamoyl group represented by the formula --SO.sub.2 NR.sup.3 R.sup.4, wherein R.sup.3 and R.sup.4 are as defined above, a group represented by the formula --COOR.sup.5 wherein R.sup.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: January 13, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinsaku Fujita, Tooru Harada, Katsusuke Endo