Patents by Inventor Shigeto Hirabayashi
Shigeto Hirabayashi 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: 5238797Abstract: Disclosed is a silver halide color photographic light sensitive material comprising a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, wherein at least one of green-sensitive silver halide emulsion layers contains at least one of colored magenta couplers represented by Formula CM-1 and at least one of dyes having absorption maximum at 590 nm to 610 nm is contained in at least one of layers selected from the layers consisting of silver halide emulsion layers and photographic constitution layers; ##STR1## wherein R.sub.1 represents a substituent, R.sub.2 represents an acylamino group, a sulfonamide group, an imide group, a carbamoyl group, a sulfamoyl group, an alkoxyl group, an alkoxycarbonyl group, an alkoxycarbonylamino group, R.sub.3 represents a halogen atom, an alkoxy group, m is an integer of 0 to 5, n is an integer of 0 to 4.Type: GrantFiled: July 9, 1992Date of Patent: August 24, 1993Assignee: Konica CorporationInventors: Shigeto Hirabayashi, Shuichi Sugita, Katsumasa Yamazaki
-
Patent number: 5236819Abstract: A photographic material having a support and a light sensitive silver halide emulsion layer which contains a magenta coupler represented by Formula M-I, a compound represented by Formula A and a compound represented by Formula B: ##STR1## wherein the substituents are as defined in the specification.Type: GrantFiled: May 14, 1991Date of Patent: August 17, 1993Assignee: Konica CorporationInventors: Kenji Kadokura, Katsumasa Yamazaki, Shigeto Hirabayashi
-
Patent number: 5128237Abstract: Significant improvement in color reproduction can be achieved by a direct positive silver halide color photographic material having at least one each of a blue-sensitive, green-sensitive and a red-sensitive direct positive silver halide emulsion layer, in which material at least one of said direct positive silver halide emulsion layer contains both silver chloride or a silver halide composed of silver chlorobromide or silver chloroiodobromide containing no less than 50 mol % of AgCl, and a specific compound that is capable of reacting with the oxidation product of a developing agent to release a specific compound capable of scavenging said oxidation product or a precursor of said scavenging compound.Type: GrantFiled: March 5, 1991Date of Patent: July 7, 1992Assignee: Konica CorporationInventors: Nariko Kimura, Tomomi Yoshizawa, Shigeto Hirabayashi, Toyoaki Masukawa
-
Patent number: 5023169Abstract: A silver halide light-sensitive color photographic material which is capable of forming a dye image of improved spectral absorption characteristic, resulting in the improved color reproducibility as well as in the image preservability and which has a high maximum density is disclosed. The material comprises a green-sensitive silver halide emulsion layer containing a magenta coupler having the following Formula [M-I], ##STR1## wherein Z, X and R is as defined in the description; and a blue-sensitive silver halide emulsion layer contains a yellow coupler having the following Formula [Y-I]; ##STR2## wherein R.sub.21, R.sub.22, R.sub.23, n, R.sub.24, J and X.sub.1 are respectively as defined in the description.Type: GrantFiled: December 15, 1989Date of Patent: June 11, 1991Assignee: Konica CorporationInventors: Shigeto Hirabayashi, Mayumi Tsuruta, Noboru Mizukura
-
Patent number: 5019493Abstract: A silver halide photographic material that has at least one silver halide emulsion layer containing a phenolic cyan coupler of the general formula (I) and an amine of the general formula (II). The maximum absorption of the dye formed in sufficiently shifted to a longer wavelength range of the spectrum to achieve satisfactory color reproduction. The dye image produced has a high maximum density and improved keeping quality.Type: GrantFiled: January 29, 1990Date of Patent: May 28, 1991Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hirokazu Sato, Shigeto Hirabayashi
-
Patent number: 5011766Abstract: A silver halide color photographic light-sensitive material is disclosed, which is improved in the color forming efficiency, the color reproducibility and the resistivity of color image against heat and humidity. The photographic material comprises a silver halide emulsion layer which contains a pyrazoloazole type cyan coupler having a group represented by Formula I which is directly bonded to the azole ring of the pyrazoloazole coupler:--(X.dbd.Y)n--R.sub.1 (I)wherein X and Y each is a substituted or unsubstituted methine group or a nitrogen atom; R.sub.1 is a hydrogen atom or a substituent; and n is an integer of 1 or 2, provided that two of Xs and two of Ys may be the same or different from each other when n is 2, and two of either X, Y and R.sub.1 are allowed to be bonded each other to form a ring other than benzene ring.Type: GrantFiled: January 4, 1990Date of Patent: April 30, 1991Assignee: Konica CorporationInventors: Shuji Kida, Hiroshi Kita, Shigeto Hirabayashi, Yutaka Kaneko
-
Patent number: 4977073Abstract: A silver halide light-sensitive color photographic material which comprises a coupler represented by formula [I]; ##STR1## wherein A represents a coupler residue that is capable of releasing the remaining group of said coupler upon reaction with an oxidation product of a developing agent; L represents a timing group which is capable of releasing the rest of the group after said remaining group being released from A; n represents 0 or 1; X represents an oxygen or sulfur atom; Y represents a --NHSO.sub.2 R.sub.1 ' group, a ##STR2## group or a --NHCOR.sub.1 ' group, in which formulas R.sub.1 ' and R.sub.2 ' independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R.sub.1 and R.sub.2 independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R.sub.3 represents a substituent group; m represents 0, 1 or 2, provided that when m is 2, two R.sub.3 s may be different, and that two of R.sub.1, R.sub.2 and R.sub.3 or two of R.sub.Type: GrantFiled: December 23, 1988Date of Patent: December 11, 1990Assignee: Konica CorporationInventors: Osamu Ishige, Toyoaki Masukawa, Shuji Kida, Shigeto Hirabayashi
-
Patent number: 4910126Abstract: A light-sensitive silver halide photographic material comprising a support and provided thereon a silver halide emulsion layer containing a magenta dye-forming coupler represented by formula (M-I) and a compound represented by formula (I): ##STR1## wherein Z represents a group of non-metal atoms necessary to complete a nitrogen-containing heterocylic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with the oxidized product of a color developing agent; and R represents a hydrogen atom or a substituent; ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent an aliphatic group or an aromatic group; and l, m, n independently represent 0 to 1 provided that l, m and n are not 1 at the same time is disclosed.Type: GrantFiled: April 7, 1988Date of Patent: March 20, 1990Assignee: Konica CorporationInventors: Hirokazu Sato, Shigeto Hirabayashi
-
Patent number: 4894322Abstract: A light-sensitive silver halide color photographic material having photographic constituent layers including a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer on a support, wherein the content of silver bromide of the silver halides in the green-sensitive silver halide emulsion layer and red-sensitive silver halide emulsion layer is 5 to 65 mole %, and the green-sensitive silver halide emulsion layer contains at least one of the compounds represented by the formula shown below: ##STR1## wherein X represents a halogen atom or a monovalent organic group eliminable through coupling reaction with an oxidized product of a developing agent; R.sub.1 to R.sub.Type: GrantFiled: February 20, 1986Date of Patent: January 16, 1990Assignee: Konica CorporationInventors: Shigeto Hirabayashi, Syoji Matsuzaka, Yukio Ohya, Yoshiyuki Nonaka
-
Patent number: 4892807Abstract: A color photographic material is disclosed, which is improved in the preservability of the dye image and in the resistance to the pH fluctuation or the contamination with bleach-fixer of the color developer. The photographic light-sensitive material comprising a support having thereon photographic component layers comprising a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer containing silver halide grains each comprising not less than 90 mol % of silver chloride, a compound represented by the following formula [S] and a cyan coupler represented by the following formula [I].Type: GrantFiled: July 29, 1987Date of Patent: January 9, 1990Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Hirokazu Sato, Eiichi Sakamoto
-
Patent number: 4882267Abstract: A silver halide photographic light-sensitive material having a high color reproducibility is disclosed. The photographic comprises a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer in which the red sensitive emulsion layer contains a non-color-forming compound represented by the following formula [I], a compound represented by the following formula [II] and at least one cyan-forming coupler represented by the following formula [III] or [IV]: ##STR1## The photographic material is improved in spectral aborption, stability and maximum density of the cyan image thereof.Type: GrantFiled: December 2, 1987Date of Patent: November 21, 1989Assignee: Konica CorporationInventors: Shigeto Hirabayashi, Hirokazu Sato
-
Patent number: 4760016Abstract: A silver halide color photographic light sensitive material is disclosed, which is excellent in the resistance to the back contamination of the processing liquid. The color photographic material comprises a support having thereon photographic component layers containing at least one silver halide emulsion layer. The emulsion containing at least one emulsion layer of the photographic component layers is a surface latent image forming type silver chloride or silver chloro-brobromide emulsion. And at least one of the photographic component layers contains at least one compound selected from the compounds represented by the formula [I]:A-(TIME)n-Z [I]in which A is a coupler component capable of coupling with the oxidized product of a color developing agent, Z is a component capable of releasing from A upon the coupling reaction of A with the oxidized product of the color developing agent and inhibiting the development of the silver halide, and Z has at least one hydrophilic group.Type: GrantFiled: October 14, 1986Date of Patent: July 26, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Kaoru Matsunaga
-
Patent number: 4710453Abstract: A silver halide color photographic material is disclosed. Said material has formed on a base photographic layers including a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, wherein said blue-sensitive silver halide emulsion layer contains at least one highly reactive yellow coupler having a relative coupling reaction rate of 0.3 or more, said green-sensitive silver halide emulsion layer containing at least one compound of Formula (I): ##STR1## wherein X is a halogen atom or a monovalent organic group capable of leaving upon coupling reaction with the oxidized product of a developing agent; R.sub.1 to R.sub.Type: GrantFiled: February 18, 1986Date of Patent: December 1, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Syoji Matsuzaka, Yukio Ohya, Yoshiyuki Nonaka
-
Patent number: 4562143Abstract: A method of forming an image by heat development of a photosensitive material comprising a support having a heat development photosensitive layer comprising imagewise exposing said layer and then bringing a non-water-permeable layer into close contact with said photosensitive layer, and heat developing said material, said photosensitive layer containing(a) an organic acid silver salt;(b) a photosensitive silver halide;(c) a reducing agent; and(d) a binder of at least one of gelatin and a gelatin derivative,said non-water-permeable layer comprising a high molecular compound selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl fluoride, polyvinyl pyrrolidone, polyvinyl chloride, polyacrylic ethyl, polymethacrylic methyl, polymethacrylic ethyl, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene, polycarbonate, polybutadiene, cellulose acetate, cellulose acetate butyrate, cellulose acetate propioType: GrantFiled: July 20, 1984Date of Patent: December 31, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa
-
Patent number: 4543309Abstract: A composition suitable for application as a layer on a heat-developable image-pattern recording material to enhance the developability and stability thereof, comprising a silver salt of a benzotriazole, a reducing agent, a binder, at least one compound having the following Formula [I]: ##STR1## wherein R.sub.1 represents a hydrogen, an amino radical, or a substituted or unsubstituted alkyl, alkenyl or aryl radical; R.sub.2 represents a hydrogen, an amino alkyl, alkenyl or aryl radical is disclosed. The disclosed composition has improved developability.Type: GrantFiled: May 16, 1984Date of Patent: September 24, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa, Tetsuya Harada
-
Patent number: 4451561Abstract: A heat-development-type image recording material comprising an organic silver salt, a reducing agent, a binder, and an amido derivative of a 5-mercapto-1,2,4-triazole or a 5-mercapto-1,3,4-thiadiazole.Type: GrantFiled: April 22, 1983Date of Patent: May 29, 1984Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa, Tetsuya Harada
-
Patent number: 4324856Abstract: A photographic silver halide material is disclosed which contains a precursor of photographic chemicals.Type: GrantFiled: October 7, 1980Date of Patent: April 13, 1982Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Satoshi Kawakatsu, Shigeto Hirabayashi, Hidetaka Ninomiya, Yutaka Kaneko
-
Patent number: 4297441Abstract: This invention relates to photographic materials containing an ion pair compound which has a quaternary nitrogen atom as a cation and a boron compound as an anion.Type: GrantFiled: June 26, 1980Date of Patent: October 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yutaka Kaneko, Satoshi Kawakatsu, Shigeto Hirabayashi, Hidetaka Ninomiya
-
Patent number: 4297437Abstract: A method for processing an exposed color photographic material containing a color developing agent or precursor by developing with a color developer which is replenished.Type: GrantFiled: November 24, 1980Date of Patent: October 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yutaka Kaneko, Shigeto Hirabayashi, Satoshi Kawakatsu, Hidetaka Ninomiya