Patents by Inventor Kazumasa Watanabe
Kazumasa Watanabe 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: 5350655Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive substrate and a photosensitive layer provided on the substrate. The photosensitive layer comprises titanylphthalocyanine having a peak at a Bragg angle 2.theta. of 27.2.degree..+-.2.degree. in the Cu-K.alpha. X ray-diffraction spectrum thereof and an alkyldiol which has 3 to 12 carbon atoms and the two hydroxyl group is bonded to carbon atoms arranged at different position in the molecular thereof. The amount of the diol is 0.1 to 1000 parts by weight per 100 parts by weight of the titanyl-phthalocyanine.Type: GrantFiled: March 9, 1993Date of Patent: September 27, 1994Assignee: Konica CorporationInventors: Tomomi Oshiba, Fumitaka Mochizuki, Hajime Tadokoro, Akira Kinoshita, Kazumasa Watanabe, Kiyoshi Tamaki, Yoshihide Fujimaki
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Patent number: 5338637Abstract: Disclosed is an electrophotographic photoreceptor which comprises a conductive substrate and a photoreceptive layer provided thereon, wherein the photoreceptive layer contains at least one of perylene compounds represented by Formula (I) and Formula (II) as the carrier-generating material, and a stryl compound represented by Formula (III) as the carrier-transport material, ##STR1## wherein Z represents each a substituted or non-substituted divalent aromatic group, ##STR2## wherein Ar.sub.1, Ar2 and Ar3 each represents a substituted or non-substituted aromatic group, n is an integer of 2 or 3.An electrophotographic photoreceptor according to this invention is improved in photosensitivity, residual potential and photoreception speed.Type: GrantFiled: June 15, 1992Date of Patent: August 16, 1994Assignee: Konica CorporationInventors: Akira Kinoshita, Tomoko Suzuki, Kazumasa Watanabe
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Patent number: 5323567Abstract: In a plant cultivating apparatus for cultivating plants by using an artificial light source, partition walls having a high light reflectance are arranged in a cultivation area to divide the cultivation area into small spaces and in each small space a light-reflecting plate is arranged, and the distance between an artificial light source and a plant is narrowed to irradiate the plant with a light having a low illuminance. In accordance with a preferred embodiment, there is provided a plant cultivating apparatus comprising sets of pallets which have plants placed therein and are arranged in rows in a growing chamber where environmental conditions which are artificially controlled and which are moved in a direction radial to the row direction in accordance with the growth of plants, wherein all the peripheral surface of the growing chamber are covered with a reflecting plate having a high light reflectance.Type: GrantFiled: June 17, 1993Date of Patent: June 28, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigeki Nakayama, Akira Ikeda, Yoshitaka Kawaai, Kenji Ezaki, Yasuko Taniguchi, Yoshinori Hattori, Kazumasa Watanabe, Tomomi Zaitsu, Kazuyoshi Yabuuchi
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Patent number: 5234785Abstract: An electrophotographic photoreceptor and a method for producing the same are disclosed, in which stability of coating solution of a photoreceptive layer is improved. The photoreceptor comprises a conductive support having thereon a photoreceptive layer containing a binder, a titanylphthalocyanine which has a peak in X-ray diffraction spectrum thereof by Cu-K.alpha. ray at a Bragg angle 2.theta. of 27.2.degree..+-.0.2.degree., and an organic solvent soluble phthalocyanine represented by the following formula I; ##STR1## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are each an alkyl group, an alkoxy group or a an aryloxy group, these groups each may have a substituent; M is a metal atom; Y is a halogen atom, an oxygen atom, a hydroxy group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, or a siloxy group, these organic groups may have a substituent; k, 1, m and n are each an integer of 0, 1, 2, 3 or 4; and p is an integer of 0, 1 or 2.Type: GrantFiled: November 15, 1991Date of Patent: August 10, 1993Assignee: Konica CorporationInventors: Akihiko Itami, Akira Kinoshita, Kazumasa Watanabe
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Patent number: 5215840Abstract: An electrophotographic photoreceptor and a method for producing the same are disclosed, in which stability of coating solution of a photoreceptive layer is improved. The photoreceptor comprises a conductive support having thereon a photoreceptive layer containing a binder, a titanylphthalocyanine which has a peak in X-ray diffraction spectrum thereof by Cu-K.alpha. ray at a Bragg angle 2.theta. of 27.2.degree..+-.0.2.degree., and a phthalocyanine derivative formed by reaction of phthalocyanine and a titanium compound represented by the following formula I or II; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each a group capable of releasing upon reaction with said phthalocyanine.Type: GrantFiled: November 15, 1991Date of Patent: June 1, 1993Assignee: Konica CorporationInventors: Akihiko Itami, Akira Kinoshita, Kazumasa Watanabe
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Patent number: 5039586Abstract: An electrophotographic photoreceptor containing titanyl phthalocyanine that has a maximum intensity peak of the Bragg angle 2.theta. at 27.3.degree..+-.0.2.degree. with respect to characteristic X-rays of Cu K.alpha. at a wavelength of 1.541.ANG. and which has a maximum intensity peak of 6.8.degree..+-.0.2.degree. in the 2.theta. range of 6.degree.-8.degree. is disclosed.Type: GrantFiled: November 6, 1989Date of Patent: August 13, 1991Assignee: Konica CorporationInventors: Akihiko Itami, Akira Kinoshita, Naohiro Hirose, Kazumasa Watanabe, Kiyoshi Sawada
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Patent number: 4692393Abstract: A photoreceptor comprising a support and thereon a photosensitive layer containing an azo compound.Type: GrantFiled: October 28, 1985Date of Patent: September 8, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Akira Kinoshita, Kazumasa Watanabe, Hiroshi Yamazaki, Naohiro Hirose
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Patent number: 4647520Abstract: A photoreceptor comprising a photosensitive layer and an electroconductive support, wherein the photosensitive layer contains an azo compound represented by the following Formula [I]: ##STR1## wherein A is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, B is an oxygen atom or a sulfur atom; R is a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom; and Cp is ##STR2## wherein Z represents a group of atoms necessary for constituting a substituted or unsubstituted aromatic carbon ring, or a substituted or unsubstituted aromatic heterocyclic ring; Y is a substituted or unsubstituted carbamoyl group or a substituted or unsubstituted sulfamoyl group;R.sub.1 is a hydrogen atom, a substituted or unsubstituted amino group, a substituted or unsubstituted carbamoyl group, a carboxy group and the esters thereof, or cyano group; A' is a substituted or unsubstituted aryl group;R.sub.2 and R.sub.Type: GrantFiled: September 27, 1985Date of Patent: March 3, 1987Assignee: Konoshiroku Photo Industry Co., Ltd.Inventors: Kazumasa Watanabe, Satoru Ikeuchi, Osamu Sasaki, Naohiro Hirose
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Patent number: 4520095Abstract: A photographic light-sensitive element having at least one light-sensitive silver halide layer and a dye image forming non-diffusible material which, upon a redox reaction under alkaline conditions releases a diffusible cyan dye or precursor thereof wherein said material is ##STR1## wherein Car represents a carrier component having at least on Ball group as a part thereof which alone or together with other such groups in said Car renders said compound non-diffusible during development in alkaline processing solution, said Car being capable of releasing from said compound a diffusible dye or the precursor thereof as the result of a redox reaction under alkaline conditions:R represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms;R.sup.1 is ##STR2## wherein R.sup.2 and R.sup.3 are independently selected from a hydrogen atom, or an alkyl, a cycloalkyl or an aryl group having from 1 to 30 carbon atoms, and R.sup.2 and R.sup.Type: GrantFiled: October 4, 1983Date of Patent: May 28, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tatsuhiko Kobayashi, Satoru Ikeuchi, Kazumasa Watanabe, Shunji Suginaka
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Patent number: 4499181Abstract: A photographic recording material. On a support are provided a silver emulsion halide layer and a photographic layer. The photographic layer contains an indole compound represented by the general formula (I): ##STR1## wherein PUG represents a photographically useful group, Ball represents an organic group which has enough molecular weight and/or disposition to render the compound non-diffusible during processing of the photographic recording material with an alkaline medium and wherein the Ball contains a nitrogen atom which is directly attached to the 5th or 6th position of the indole ring. R.sub.1 represents a halogen atom or a monovalent organic group. R.sub.2 represents a hydrogen atom or a low molecular group attached, through a carbon atom, to the 2nd position of the indole ring. "m" represents an integer of zero to 3.Type: GrantFiled: June 2, 1983Date of Patent: February 12, 1985Assignee: Konishiroku Photo Ind., Co., Ltd.Inventors: Kazumasa Watanabe, Hidetaka Deguchi, Shunji Suginaka
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Patent number: 4256831Abstract: A light-sensitive photographic element comprising a support and at least one light-sensitive silver halide emulsion layer coated thereon having associated therewith a magenta image dye-providing compound which releases a magenta dye or a precursor thereof corresponding to the imagewise exposure of said emulsion layer, said magenta dye-providing compound being a compound represented by formula [I]: ##STR1## wherein Car represents a carrier moiety which can be oxidized under alkaline conditions to release a diffusible dye or a precursor thereof from said compound;R.sup.1 and R.sup.2, which may be the same or different, independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms (provided that the total sum of carbon atoms in R.sup.1 and R.sup.2 does not exceed 5), or R.sup.1 and R.sup.Type: GrantFiled: August 22, 1979Date of Patent: March 17, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masaru Kanbe, Kazumasa Watanabe, Morito Uemura, Jiro Takahashi, Ryuichiro Kobayashi, Tatsuhiko Kobayashi
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Patent number: 4247629Abstract: A light-sensitive photographic element comprising a support and at least one light-sensitive silver halide emulsion layer coated thereon having associated therewith a cyan image dye-providing compound which releases a cyan dye or a precursor thereof corresponding to the imagewise exposure of said emulsion layer, said cyan image dye-providing compound being a compound represented by formula [I] or [II]: ##STR1## wherein Car, R.sup.1, R.sup.2, X, Y.sup.1, Y.sup.2, m, J.sup.1 and J.sup.2 are defined in the specification and claims.Type: GrantFiled: August 22, 1979Date of Patent: January 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masaru Kanbe, Kazumasa Watanabe, Morito Uemura, Jiro Takahashi, Ryuichiro Kobayashi, Tatsuhiko Kobayashi
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Patent number: 4225708Abstract: 2-Sulfamoyl-5-sulfamido-1-naphthols represented by the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be the same or different and each represent a hydrogen atom, a straight-chain alkyl group, a branched alkyl group or a cycloalkyl group; or R.sup.1 and R.sup.Type: GrantFiled: August 22, 1979Date of Patent: September 30, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masaru Kanbe, Kazumasa Watanabe, Morito Uemura, Jiro Takahashi, Ryuichiro Kobayashi, Tatsuhiko Kobayashi
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Patent number: 4209328Abstract: In a dye image forming process in color photography comprising imagewise exposing a photographic element comprising a support and a light sensitive silver halide emulsion layer, and processing the exposed photographic element with an alkaline processing solution in the presence of a dye developer whereby a dye image corresponding to the imagewise exposure is formed by oxidation of said developer as a function of development of silver halide, the improvement which comprises the dye developer being a mono azo dye developer represented by the following formula:X--N.dbd.Type: GrantFiled: June 22, 1977Date of Patent: June 24, 1980Assignees: Konishiroku Photo Industry Co., Ltd., Mitsubishi Chemical Industries LimitedInventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya
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Patent number: 4099972Abstract: A process for forming a dye image on a receiving element by diffusion transfer from a photosensitive element is disclosed wherein the exposed photosensitive element is processed with an alkaline solution in the presence of a particular dye developer having at least one azo radical.Type: GrantFiled: July 28, 1976Date of Patent: July 11, 1978Assignees: Mitsubishi Chemical Industries Limited, Konishiroku Photo Industry Co., Ltd.Inventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya
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Patent number: 3985612Abstract: A paper forming machine includes at least one porous rotatable cylinder. An inner forming fabric or media in mesh form (hereinafter referred to as "inner forming media") is guided through a path around the cylinder and has a straight portion immediately before the cylinder. An outer forming fabric or media in mesh form (hereinafter referred to as "outer forming media") is guided so as to form a closing angle over the straight path of the inner forming media toward the uppermost portion of the cylinder, and is guided around a portion of the cylinder over the inner forming media and through a path in juxtaposition with the inner forming media leading away from the cylinder. Paper is formed by depositing a paper forming material slurry on the straight portion of the inner forming media which is porous so that the slurry becomes partly dehydrated and the fibers become oriented in the direction of movement.Type: GrantFiled: August 25, 1975Date of Patent: October 12, 1976Inventor: Kazumasa Watanabe