Patents by Inventor Hirokazu Sato
Hirokazu Sato 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).
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Patent number: 5576161Abstract: A silver halide color photographic material improved in color forming properties and light fastness of color image is disclosed, comprising a support having thereon a light-sensitive silver halide emulsion layer and a nonlight-sensitive layer, wherein the nonlight-sensitive layer contains a UV absorbent and the silver halide emulsion layer contains a polyhydric alcohol.Type: GrantFiled: July 24, 1995Date of Patent: November 19, 1996Assignee: Konica CorporationInventors: Motoi Nishimura, Hirokazu Sato, Hiroshi Kita
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Patent number: 5545514Abstract: A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material has a silver halide emulsion layer which contains oleophilic particles comprising a dye-forming coupler and a water-insoluble monohydric alcohol represented by the following Formula I, II or III; ##STR1## wherein m is an integer of 1 to 20; one of R.sub.11, R.sub.12 and R.sub.13 in number of m is a hydrogen atom and other groups represented by R.sub.11, R.sub.12 and R.sub.13 are each an acyl group; and the total number of carbon atoms contained in the acyl groups represented by R.sub.11, R.sub.12 and R.sub.13 are not less than 8; ##STR2## wherein one of R.sub.21, R.sub.22, R.sub.23 and R.sub.24 is a hydrogen atom and other groups represented by R.sub.21, R.sub.22, R.sub.23 and R.sub.24 are each an acyl group and the total number of carbon atoms contained in the acyl groups represented by R.sub.21, R.sub.22, R.sub.23 and R.sub.24 is not less than 12; ##STR3## wherein one of R.sub.31, R.sub.32, R.sub.33 and R.Type: GrantFiled: July 11, 1995Date of Patent: August 13, 1996Assignee: Konica CorporationInventors: Hiroshi Kita, Hirokazu Sato, Koji Daifuku
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Patent number: 5376520Abstract: A silver halide color photographic light-sensitive material containing a polyvalent alcohol is disclosed. The polyvalent alcohol has two or more hydroxy group and is water immissible. The polyvalent alcohol is used in combination with a dye forming coupler.Type: GrantFiled: December 2, 1993Date of Patent: December 27, 1994Assignee: Konica CorporationInventors: Hiroshi Kita, Hirokazu Sato
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Patent number: 5314796Abstract: A silver halide color photographic light sensitive material excellent in both sharpness and whiteness of background while being capable of satisfactorily displaying the yellow coupler characteristics including an excellent color reproduction is provided, wherein the silver halide color photographic light sensitive material contains a compound represented by the following Formula [I] in at least one of the photographic component layers thereof, a compound represented by the following Formula [II] in at least one of the silver halide emulsion layers thereof, and a compound represented by the following Formula [III] in at least one of the photographic component layers; and ##STR1##Type: GrantFiled: March 26, 1993Date of Patent: May 24, 1994Assignee: Konica CorporationInventors: Kazuhiro Murai, Makoto Kajiwara, Hirokazu Sato, Shinri Tanaka, Mitsuhiro Okumura
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Patent number: 5273869Abstract: Disclosed is a light-sensitive silver halide color photographic material having a photographic constituent layer containing an yellow color-forming coupler, a magenta color-forming coupler and a cyan color-forming coupler on a reflective support, characterized in that when each coupler is color-formed independently, the rate of a maximum value of CIE 1976L*a*b* color difference between a colored portion and a minimum density portion of cyan relative to a smaller value of yellow or magenta is 80% or more, and .DELTA.E.sub.Type: GrantFiled: March 7, 1991Date of Patent: December 28, 1993Assignee: Konica CorporationInventors: Shigeo Tanaka, Hirokazu Sato
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Patent number: 5272053Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer provided on the support, and the silver halide emulsion layer comprises a hydrogen peroxide-treated gelatin in a ratio of not lower than 20% by weight to the total amount of gelatin contained in the silver halide emulsion layer and silver halide grains composed of silver chlorobromide having a silver chloride content of not lower than 90 mol %. The light-sensitive material is improved in the stability of emulsion coating solutions.Type: GrantFiled: December 15, 1992Date of Patent: December 21, 1993Assignee: Konica CorporationInventors: Mitsuhiro Okumura, Shigeo Tanaka, Hirokazu Sato
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Patent number: 5236804Abstract: A silver halide photographic light-sensitive material comprises a support having thereon photographic component layers including a silver halide emulsion layer, wherein at least one of said photographic component layers contains a compound represented by the following formula:A--(Time)n--FL--BLwherein A represents a group capable of releasing a group of --(Time)n--FL--BL upon reaction with an oxidation product of a developing agent; Time represents a timing group; FL represents a group which comes to emit fluorescence when a --BL is split off; BL represents a group capable of being split off; and n represents an integer of 0 or 1.Type: GrantFiled: February 26, 1991Date of Patent: August 17, 1993Assignee: Konica CorporationInventors: Shigeo Tanaka, Hirokazu Sato, Satoru Ikesu
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Patent number: 5227282Abstract: Disclosed is a light-sensitive silver halide color photographic material having at least three kinds of silver halide emulsion layers with different color sensitivities on a reflective support and also having yellow, magenta and cyan color forming couplers for forming colors related to developing of said silver halide emulsions, characterized in that when the coupler for forming color related to said color sensitive silver halide emulsion bearing primarily cyan color image is color formed to a cyan image density of 0.4, the color difference (color difference .DELTA.E in the CEI 1976 L*a*b* color space) from the minimum density is .DELTA.E.gtoreq.23.Type: GrantFiled: August 27, 1991Date of Patent: July 13, 1993Assignee: Konica CorporationInventors: Shigeo Tanaka, Hirokazu Sato
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Patent number: 5204232Abstract: Disclosed is a light-sensitive silver halide photographic material having at least one silver halide emulsion layer on a support, characterized in that at least one layer of the above silver halide emulsion layers contains a compound represented by the following formula (I): ##STR1## wherein n represents 0 or 1; A represents a compound residue which cleaves a bonding to Time in the case of n=1 or a compound residue which cleaves one of bondings to FL in the case of n=0; Time represents a timing group which cleaves a bonding to FL after cleavage from A; and FL represents a compound residue which emits fluorescence by cleavage of a bonding to Time in the case of n=1 and a compound residue which emits fluorescence by cleavage of one of bondings to A in the case of n=0.Type: GrantFiled: March 11, 1991Date of Patent: April 20, 1993Assignee: Konica CorporationInventors: Hirokazu Sato, Shigeo Tanaka, Satoru Ikesu
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Patent number: 5077188Abstract: A silver halide photographic light-sensitive material is disclosed, which is improved in stability of cyan dye image formed therein. The light-sensitive material comprises a support having thereon a silver halide emulsion layer containing oleophilic dispersed particles. The particles comprises a cyan coupler represented by the following Formula I, an organic solvent selected from phthalic esters having a dielectrical constant of not more than 6.0 and a polymer compounds which is insoluble in water and soluble in a organic solvent: ##STR1## wherein R.sub.1 is a ballast group, R.sub.2 is an alkyl group having 2 or more carbon atoms and Z.sub.1 is a hydrogen atom or a substituent capable of splitting off upon reaction with the oxidation product of a color developing agent.Type: GrantFiled: February 1, 1990Date of Patent: December 31, 1991Assignee: Konica CorporationInventors: Masaki Tanji, Toyoki Nishijima, Hirokazu Sato, Tomomi Yoshizawa
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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
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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
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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
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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
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Patent number: 4838368Abstract: A manual combinatorial weighing apparatus having one or more weighing devices housed in a casing with each weighing device having a scale plate for placing articles thereon, and indicators associated with the weighing devices for indicating selected weighing devices. As many weighing devices in casings as desired by the user are provided in a desired layout. Weight data items of the articles put on the scale plates are combined to find a weight combination giving a desired total weight. The selected weighing devices are indicated by the indicators, which are held energized until the articles are removed from the selected weighing devices.Type: GrantFiled: December 10, 1987Date of Patent: June 13, 1989Assignee: Ishida Scales Mfg. Co., Ltd.Inventors: Hirokazu Sato, Yasuhiro Goto, Kazufumi Horiuchi, Yasuo Michibayashi, Hideo Nobutsugu, Takumi Kawamura
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Patent number: 4730245Abstract: A power converter having an ac side connected through a reactor to an ac power source and a dc side connected to a smoothing capacitor and a load, the converter being capable of converting and inverting electric power in accordance with the pulse width modulation control, characterized by comprising: a voltage detection circuit for detecting a voltage on the side of the ac power source when viewed from the reactor; a first judgement section for detecting that the amplitude of a voltage component on the ac side of the power converter, which is included in the ac power source voltage, is above a predetermined value on the basis of an output signal from the voltage detection circuit to produce a signal indicative of the judgement result; a second judgement section for detecting that the amplitude of the ac power source voltage is below the predetermined value to produce a signal indicative of the judgement result; and a gate circuit for performing logical sum of the outputs from the first and second judgement seType: GrantFiled: September 22, 1986Date of Patent: March 8, 1988Assignee: Kabushiki Kaisha ToshibaInventor: Hirokazu Sato
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Patent number: 4729082Abstract: The invention relates to the control of a power converter in which the AC side is connected through a reactor to an AC power supply while the DC side is connected to a smoothing capacitor and a load and the power rectification and the power inversion are carried out by the pulse width modulation control. The controls performed include (1) the control, whereby the voltage across the smoothing capacitor coincides with a predetermined value and the current flowing through the reactor and the voltage of the AC power supply have a predetermined phase relationship; (2) the DC component compensation control for eliminating the DC component in an AC circuit within a short time interval and (3) the control of the power conversion operation by utilizing a microprocessor while suppressing the higher harmonics in the AC power supply. The control (1) is performed by using an amplitude signal of the voltage on the AC side of the power converter and a phase difference signal relative to the AC power supply voltage.Type: GrantFiled: November 20, 1986Date of Patent: March 1, 1988Assignee: Kabushiki Kaisha ToshibaInventor: Hirokazu Sato
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Patent number: 4581094Abstract: This device relates to a device for suction-sticking display labels, in which display labels without being printed have been stuck contiguously in many number onto a long ground sheet which is wound on a feeding reel, the labels are peeled by a peeling metal fitting after they are printed, the ground sheet only is wound on a winding reel, the display labels are adsorbed by a suction bracket which is provided in front of the peeling metal fitting being drawn by the air intaken by the intake/exhaust duct of the sticking device, and the display labels are stuck by the blow of air onto predetermined positions of package trays that come beneath the sticking device. In particular, this device relates to a device for suction-sticking display labels, in which the label which is peeled off from the ground sheet being adsorbed by the intake/exhaust bracket but which is still adhered at its rear end to the ground sheet, is forcibly peeled off by a proceed/rectract device together with the intake/exhaust bracket.Type: GrantFiled: January 13, 1984Date of Patent: April 8, 1986Assignee: Kabushiki Kaisha Ishida Koki SeisakushoInventor: Hirokazu Sato
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Patent number: 4578926Abstract: Merchandise discharged from a packaging machine in a lateral posture can be reliably aligned into a longitudinal posture, and the merchandise can then be sent to a labeling machine with one side of each article in sliding contact with an article-aligning member at all times, irrespective of the size of tray used. This enables the omission of the operations of correcting the posture and position of articles by an operator, and the articles can always be labeled at correct portions thereof, said turn conveyor is so formed that the height of a start end thereof can be regulated to enable the turn conveyor, alignment conveyor, weighing machine and labeling machine to be connected to a packaging machine which has an article discharge section at a height different from that of the turn conveyor or an intermediate conveyor connected to the discharge section of the packaging machine.Type: GrantFiled: February 27, 1984Date of Patent: April 1, 1986Assignee: Kabushiki Kaisha Ishida Koki SeisakushoInventors: Hirokazu Sato, Kazuo Koyama
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Patent number: H1429Abstract: The present invention offers a silver halide photographic light-sensitive material which is excellent in dye image storage stability, which undergoes little change in the photographic performance thereof between initiation and completion of continuous processing, which has excellent color reproducibility and sufficient color developability. The present invention comprises a silver halide photographic light-sensitive material having at least one silver halide emulsion layer containing a dye-forming coupler on the support, wherein said silver halide emulsion layer contains at least one compound having an ester group and an oxidation potential of not more than 1800 mV.Type: GrantFiled: June 19, 1992Date of Patent: April 4, 1995Assignee: Konica CorporationInventors: Motoi Nishimura, Hirokazu Sato, Katsumasa Yamazaki, Shigeto Hirabayashi