Fuji Photo Film Company, Limited

Reiichi Ohi

Keisuke Shiba

Tadao Shishido

Keiichi Adachi

Toshiaki Aono

Masanao Hinata

Akira Sato

Takeshi Hirose

Yoshiyuki Nakazawa

Tokiharu Kondo, Deceased

By Yoshiharu Kondo, Legal Representative

Hiroshi Hara

Akira Ogawa

Hidetoshi Kobayashi

Yuji Mihara

Minoru Yamada

Kei Sakanoue

Seiiti Kubodera

Kiyoshi Nakazyo

Atsuaki Arai

Yasushi Oishi

Kimitaka Kameoka

Naoki Arai

Yosuke Nakajima

Tohru Sueyoshi

Yasuharu Nakamura

Junichi Matsuyama

Masanaga Ohki

Kenji Yokoo

Mitsunori Sugiyama

Katsuhiko Ohtani

Masanao Hinato

Yoshuhara Nakamura

Tokiharu Kondo

Yoshio Kosuge

Norihiko Katoh

A color-forming aminopyrimidine coupler represented by formula (I): ##STR1## where R.sub.1, R.sub.2, and R.sub.3 independently represent a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic-oxy group, an alkylthio group, an arylthio group, a heterocyclic-thio group, a substituted or unsubstitued amino group, a heterocyclic group bonding to the pyrimidine ring via a nitrogen atom thereof, an alkyl group or an aryl group; provided that at least one of R.sub.1, R.sub.2 and R.sub.3 is an unsubstituted or substituted amino group, and that when any one of R.sub.1, R.sub.2 or R.sub.3 contains a sulfonic acid group or a salt thereof, R.sub.1 , R.sub.2 or R.sub.3 contains at least one linear or branched alkyl group and that the total carbon atoms in the alkyl group(s) are to be more than 8; and R.sub.4 represents a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic-oxy group, an alkylthio group, an arylthio group, a heterocyclic-thio group, a substituted or unsubstituted amino group, or a heterocyclic group bonding to the pyrimidine ring via a nitrogen atom thereof. At least one coupler of formula (I) is incorporated into the photographic constitutive layer of a color silver halide photographic material, which gives a color image with high heat-fastness.

Color-forming aminopyrimidine couplers and silver halide color

A multi-layered color photographic light-sensitive material which comprises a support having thereon at least two light-sensitive silver halide emulsion layers which provide images having substantially different hues, with the light-sensitive material including 2-equivalent couplers and/or 4-equivalent anilinopyrazolone couplers and at least one of the light-sensitive silver halide emulsion layers or a colloidal layer of the light-sensitive material containing a hydroquinone derivative or a hydroquinone precursor substituted with a heterocyclic monothio group and an aliphatic monothio group, an aryl monothio group, an aliphatic oxy group, an aryloxy group or a heterocyclic oxy group and having a ballasting group containing 8 or more carbon atoms.

Multi-layered color photographic light-sensitive material

A practical, useful gelatino silver halide photo-sensitive material having incorporated therein a compound represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent a hydroxyl group, a hydroxylamino group, an amino group, an alkylamino group of from 1-6 carbon atoms, said alkyl group of said alkylamino group capable of being substituted by a member selected from the group consisting of a hydroxy group, a dialkylamino group of from 2 to 8 carbon atoms and an alkoxy group of from 1 to 4 carbon atoms, an arylamino group, said arylamino group capable of being substituted with a member selected from the group consisting of an alkyl group of from 1 to 4 carbon atoms, an alkoxy group of from 1 to 4 carbon atoms, a hydroxy group and a halogen atom, an alkoxyl group of from 1 to 6 carbon atoms, an aryloxy group, said aryloxy group capable of being substituted with a member selected from the group consisting of an alkyl group of from 1 to 4 carbon atoms, an alkoxy group of from 1 to 4 carbon atoms, a hydroxy group, and a halogen atom, an alkyl group of from 1 to 6 carbon atoms, an aryl group, said aryl group capable of being substituted with a member selected from the group consisting of an alkyl group of from 1 to 4 carbon atoms, an alkoxy group of from 1 to 4 carbon atoms, a hydroxy group, and a halogen atom, or a halogen atom, said compound represented by the above described formula containing no more than one group which is active to gelatin, with the proviso that if R.sub.1, R.sub.2 or R.sub.3 is a halogen atom, no more than one of said R.sub.1, R.sub.2 and R.sub.3 can be a halogen atom.

Gelatino silver halide photosensitive material

A process for producing 2,2,4-trimethyl-6-hydroxy-7-substituted chromans which comprises reacting 2-substituted hydroquinones with 2-methyl-2,4-pentanediol in the presence of a Friedel-Crafts catalyst.

Process for producing 2,2,4-trimethyl-6-hydroxy-7-substituted chromans

A color photographic light-sensitive material comprising a silver halide photographic emulsion containing (1) at least one compound selected from the group consisting of (a) a compound represented by the following general formula (I);

Color photographic light-sensitive material

A silver halide color photographic material comprising a support having thereon at least a silver halide emulsion layer containing a hydrophobic phenolic or naphtholic cyan dye forming coupler together with a 2-(2'-hydroxyphenyl)benzotriazole compound. The color photographic material provides a cyan dye image having improved moisture resistance and high fastness to heat.

Silver halide color photographic materials

A photographic silver halide emulsion containing at least one dinuclear merocyanine sensitizing dye, and at least one compound represented by the following formula: ##STR1## wherein D represents a divalent aromatic group, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom, a hydroxyl group, an alkoxyl group, an aryloxy group, a halogen atom, a heterocyclic group, a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, an amino group, an alkylamino group, a cycloalkylamino group, an arylamino group, a heterocyclic amino group, an aralkylamino group, or an aryl group.

Photographic silver halide emulsion

A silver halide photographic emulsion containing the combination of (i) at least one cyanine dye wherein two basic 5-membered and/or 6-membered nitrogen-containing heterocyclic nuclei are linked by methine groups having an odd number of carbon atoms not exceeding 7 and the substituents on the nitrogen atoms in the heterocyclic nuclei are aliphatic groups or aromatic groups with at least one of the substituents on the nitrogen atom being an alkyl group having a sulfo group or a carboxyl group, and (ii) at least one substantially colorless nitrogen-containing heterocyclic organic base selected from the group consisting of a benzothiazole, a benzothiazolone, a naphthothiazole, a naphthothiazolone, and a quinolone in a quantity sufficient to supersensitize.

Silver halide photographic emulsion

Fine grain silver halide photographic emulsions adapted for electron beam recording containing at least one compound represented by the following formula; ##SPC1## Wherein A represents an aliphatic group (substituted or unsubstituted), preferably an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group or a 5- or 6-membered heterocyclic ring containing at least one nitrogen atom, R.sub.1 and R.sub.2 represent a hydrogen atom or a lower alkyl group, and n represents 0 or 1.

Silver halide photographic emulsions used for electron beam recording

Tri-substituted hydroquinone compounds having an aryl-tetrazol-5-ylthio group and at least one thioether group useful as photographic additives.

Aryl-tetrazol-5-ylthio- and thioether-substituted hydroquinone compounds

A color photographic silver halide light-sensitive material containing a 2-equivalent alpha-acylacetoamide yellow dye-forming coupler and a monoalkylhydroquinone.

Color photographic silver halide light-sensitive materials

A silver halide photographic material having increased sensitivity and gradient and being free from fog formation on storage, comprising a support and an emulsion layer containing very fine silver halide grains and containing a nitrogen-containing heterocyclic organic compound having a hydroxylamino group, such as 2-hydroxylamino-4,6-di(ethylamino)-1,3,5-triazine or 2,4-di(hydroxylamino)-6-diethylamino-1,3,5-triazine. The photographic material is useful for recording fine images with a superior sharpness, and the incorporation of the heterocyclic compound increases the sensitivity in spite of the fine grain size of the silver halide.

Photographic material containing fine silver halide particles and

A silver halide photographic material having improved sensitivity unaccompanied by an increase in fog formation containing, in a photographic layer thereof, an organic compound having a nitrogen-halogen bond in the molecule.

Silver halide photographic material containing an organic compound

A silver halide light-sensitive material which comprises a light-sensitive silver halide emulsion containing a compound represented by the following formula (I): ##SPC1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represents a hydrogen atom or a lower alkyl group; and R.sub.6 and R.sub.7 each represents a hydrogen atom, a lower alkyl group or a lower alkoxy group or can combine to form a condensed ring, and X.sup.- represents an anion.

Silver halide emulsion containing an alkenyl benzothiazolium salt as

2,5-BIS-(1',1'-Dimethylbutyl)hydroquinone and a process for the production thereof which comprises reacting hydroquinone with 2-methyl-1-pentene.

Growing community of inventors

Minami-ashigara, Japan

Reiichi Ohi