Patents Examined by Mary F. Downey
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Patent number: 4514491Abstract: A photosensitive silver halide emulsion comprising photosensitive silver halide grains which essentially consists of monodisperse globular-shaped grains. The grains may be prepared by adding a silver halide solvent to a silver halide emulsion containing monodisperse silver halide grains of regular crystal habit at a time between the complete formation of the monodisperse silver halide grains of regular crystal habit and before commencement of chemical sensitization.Type: GrantFiled: May 3, 1982Date of Patent: April 30, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Takeo Koitabashi, Syoji Matsuzaka, Yuji Hotta, Masatoshi Iwata
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Patent number: 4511648Abstract: This invention presents a light-sensitive silver halide color photographic material having at least two silver halide emulsion layers having sensitivities in different spectral regions on the same side of a support, at least one layer of the layers comprising at least two silver halide emulsion layers with different sensitivities, in which each of the at least two silver halide emulsion layers with different sensitivities contains at least one kind of substantially monodispersed silver halide crystals and at least one silver halide emulsion layer of the layers comprises substantially silver iodobromide containing 4 mole % or more of silver iodide, and further the iodine content in the emulsion layer having the highest sensitivity is higher than that of the emulsion layer having a sensitivity second to the highest.Type: GrantFiled: February 24, 1983Date of Patent: April 16, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kiyoshi Yamashita, Toshifumi Iijima
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Patent number: 4510221Abstract: A method for producing a phase hologram having a high diffraction efficiency which includes treating a developed photographic material with a stop bath containing sodium sulfate, bleaching with a tanning bleach having a low pH value and fixing the bleached material in a bath containing sodium thiosulfate.Type: GrantFiled: August 1, 1983Date of Patent: April 9, 1985Assignee: NCR CorporationInventors: Brian A. Gorin, Ping-Pei Ho
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Patent number: 4510229Abstract: A lithographic photosensitive material which comprises a support having thereon at least one silver halide emulsion layer and that, contains as a lithographic development accelerating agent a compound represented by the following general formula (I) in its silver halide emulsion layer or another hydrophilic colloidal layer: ##STR1## wherein R.sub.1 to R.sub.5 may be the same or different, and they each represent hydrogen, a halogen atom, an alkyl group, an alkoxy group, an aryl group, ##STR2## (wherein R.sub.6 and R.sub.7 each represents hydrogen or an alkyl group, or they may combine with each other to form a 5- or 6-membered nitrogen containing saturated hetero ring), --NH--CO--R.sub.8 or --NHSO.sub.2 --R.sub.9 (wherein R.sub.8 and R.sub.9 each represents an alkyl group, an aryl group or an aralkyl group), or R.sub.3 and R.sub.4, or R.sub.4 and R.sub.5 may combine with each other to form a benzene ring and that, it is necessary to said compound that at least one of substituents R.sub.1, R.sub.3 and R.sub.Type: GrantFiled: March 19, 1984Date of Patent: April 9, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yutaka Oka, Naomi Saeki, Yoshiharu Fuseya
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Patent number: 4510223Abstract: A method of electrophotographic color reproduction by forming sequentially superimposed toner images of each color successively on the photoconductive surface of an electrophotographic recording member. The photoconductive surface is charged uniformly by a corona generator to a predetermined charge level. The charged surface is exposed to a first color radiation pattern from a source thereof to form a latent electrostatic charge image on said surface. The resulting latent charge image is toned with one color toner to produce a first toner image. The resulting toner image is dried. Thereafter, a charge is applied uniformly to the same photoconductive surface including those portions thereof carrying the dried first toner image in a manner so that the generated charged ions effectively tunnel through the dry adjacent toner particles defining first toner image to reach the photoconductive surface.Type: GrantFiled: May 27, 1983Date of Patent: April 9, 1985Assignee: Coulter Systems CorporationInventors: Manfred R. Kuehnle, Ferdinand Martinez, I. V. Runyan, Carol M. F. Barry
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Patent number: 4510236Abstract: Thermally developable light sensitive material containing a light sensitive silver halide, an oxidizing agent, a reducing agent, and a combination of 2-(hydroxymethyl)-1(2H)-phthalazinone as a toning agent precursor and certain polycarboxylic acids or derivatives thereof as a catalyst for said toning agent precursor. Upon heat development of the exposed photothermographic material, the 2-(hydroxymethyl)-1(2H)-phthalazinone decomposes to form phthalazinone. The thus-formed phthalazinone acts as a toning agent for the light exposed silver halide.Type: GrantFiled: December 20, 1983Date of Patent: April 9, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gustav Gutman
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Patent number: 4510232Abstract: An element for optically recording digitally encoded information which comprises a support carrying an array of discrete regular geometric spaced depressions in a surface, each of said depressions carrying material capable of a transformation in response to a level of radiation adapted to effect said transformation, wherein said transformation is optically detectable.Type: GrantFiled: February 15, 1984Date of Patent: April 9, 1985Assignee: Polaroid CorporationInventor: Arthur M. Gerber
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Patent number: 4508818Abstract: A silver halide photographic sensitive material is disclosed. The material is comprised of a support base which has a sensitive silver halide emulsion layer on the surface of the base. On the silver halide emulsion layer is a first and a second insensitive layer. The second insensitive layer has a melting time which is higher than that of the first insensitive layer. The first insensitive layer has a melting time which is equal to or higher than the melting time of the silver halide emulsion layer. The resulting material can be advantageously utilize within an automatic developing apparatus. The material has improved mechanical properties and results in a reduced amount of scum being formed within the developing solution.Type: GrantFiled: March 26, 1984Date of Patent: April 2, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Masashi Ogawa, Kunio Ishigaki, Nobuyuki Iwasaki, Taku Nakamura
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Patent number: 4504558Abstract: For compensating scattering losses of electrons in photoresists (proximity effect) which influence electron beam lithography by altering the pattern geometry it is suggested to expose selected partial areas of a pattern to an additional irradiation dosage in a second exposure step. For that purpose, a specific mask with corresponding correction openings can be used which is applied with the same, or with a different electron beam intensity. In a particularly advantageous manner the correction of the proximity effect can be achieved when complementary masks are used; the correction openings for the partial areas of the one complementary mask are arranged in the other complementary mask. The proximity effect is then corrected without an additional exposure step.Type: GrantFiled: October 13, 1983Date of Patent: March 12, 1985Assignee: International Business Machines CorporationInventors: Harald Bohlen, Helmut Engelke, Johann Greschner, Peter Nehmiz
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Patent number: 4504577Abstract: A silver halide photographic material is disclosed which is comprised of a support having formed thereon a light-sensitive silver halide layer and a particular compound represented by the general formulae (I), (II) and (III). The compound is utilized in the photographic material in order to prevent the occurrence of contaminations which are caused by metals intermixed in the silver halide photographic materials during production, packaging, preservation and/or processing. The presence of such compounds also prevents the deterioration of photographic materials caused by metal ions existing in processing solutions and aids in preventing the reduction in the uniformity of processing.Type: GrantFiled: February 27, 1984Date of Patent: March 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshinobu Yoshida, Nobuo Sakai, Takatoshi Ishikawa
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Patent number: 4504572Abstract: Silver halide photographic elements for tanning development including tanning developers, which can diffuse into the gelatin layer containing them, can be improved if they are associated with non-diffusing hydroquinones. In the case where such tanning developer is hydroquinone or a derivative thereof, said elements include such diffusing hydroquinone associated with a hydroquinone derivative non-diffusing in the gelatin layer containing it. Such non-diffusing hydroquinones preferably are hydroquinones substituted with aliphatic chains containing a total of at least twelve carbon atoms and, more preferably, are dispersed in the layer dissolved in a high-boiling organic solvent.Type: GrantFiled: August 4, 1983Date of Patent: March 12, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventors: Marco Beruto, Antonio Luzzi, Piero Ramello
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Patent number: 4501812Abstract: Color developer composition packaged in two or more concentrated parts, which on mixing with water give a ready-for-use silver halide developer solution, one part thereof comprising an aqueous concentrated solution containing a N-hydroxyalkylsubstituted p-phenylene diamine salt developing agent and a sulfite compound, said aqueous concentrated solution having a pH from 6 to 8. In particular, said N-hydroxyalkyl-substituted p-phenylene diamine developing agent is a 4-amino-3-methyl-N-ethyl-N-(.beta.-hydroxyethyl)-aniline and the molar ratio of the sulfite compound to the developing agent is higher than 1.5:1.Type: GrantFiled: February 2, 1984Date of Patent: February 26, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Carlo Marchesano
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Patent number: 4500636Abstract: A silver halide photographic light-sensitive material which comprises a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent, said blocked photographic agent being represented by the following general formula (I): ##STR1## wherein A represents a photographic agent moiety which is attached to a blocking moiety through a hetero atom; Z represents a divalent linkage group; p represents 0 or 1; X and Y each represents a substituent: m represents an integer of 0 to 4: and n represents an integer of 0 to 5.Type: GrantFiled: January 27, 1984Date of Patent: February 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsunori Ono, Isamu Itoh, Keiji Mihayashi, Yukio Karino
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Patent number: 4500632Abstract: A process for stabilizing a silver image is disclosed. The process is utilized in connection with a photographic material which is comprised of a water impermeable support having one or more light-sensitive silver halide emulsion layers thereon. After the photographic material is exposed and developed it is subjected to further processing by conventional means. However, within the further processing an aqueous solution is utilized which includes any compounds represented by the general formula (I), (II) or (III) as defined within the specification. The compound(s) represented by the general formula is/are generally present within the processing solution in a total amount of about 0.1 to 10 g/l of processing solution. By utilizing the aqueous solution containing the compound represented by the general formula within the processing, it is possible to greatly increase the stability of the silver image formed.Type: GrantFiled: March 5, 1984Date of Patent: February 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Kunioki Ohmura, Masaaki Torigoe, Isamu Itoh, Katsumi Hayashi
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Patent number: 4500631Abstract: A radiographic image forming process comprising imagewise exposing a negative type silver halide light-sensitive photographic material in combination with a fluorescent intensifying screen to radiation and then treating said material with a processing solution, said material comprising a support and constituent layers coated on both sides of said support, said layers containing(a) light sensitive silver halide particles,(b) metallic salt particles which are not light-sensitive and, when untreated, are more soluble in said processing solution than said silver halide particles, said metallic salt particles having been treated so that the surface thereof has been rendered less soluble than said silver halide by a dissolution retarder,(c) physical development nuclei, and(d) compounds selected from water soluble dyes having absorption maxima in an aqueous solution of from 400 to 600 nm or compounds selected from said water soluble dyes coupled to a non-diffusive mordant, andsaid processing solution containing at lType: GrantFiled: August 5, 1983Date of Patent: February 19, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Eiichi Sakamoto, Mikio Kawasaki, Kouji Ono, Kakujulo Fukuoji, Noboru Fujimori
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Patent number: 4499129Abstract: A wraparound recoverable closure, wherein a portion of the closure is not recovered against a substrate, which has a flap to seal across the gap between the abutting edge portions of the closure. Where the closure does not recover against and contact a substrate, the flap does not seal adequately for some applications. This invention provides means for supporting the flap to improve the seal. The preferred embodiment is a bag inside the closure which contains a resilient liner which supplies pressure on the flap to seal the flap across said gap.Type: GrantFiled: October 14, 1983Date of Patent: February 12, 1985Assignee: Raychem CorporationInventors: Thomas A. Kridl, Carney P. Claunch, Ann O. Bjornstrom
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Patent number: 4499178Abstract: An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, a reflecting layer made of a metal, and a heat insulating layer interposed between said recording layer and said reflecting layer. The material makes it possible to record information at high sensitivity and read recorded information by reflected light at high contrast.Type: GrantFiled: June 14, 1982Date of Patent: February 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Wada, Yonosuke Takahashi, Eiichi Hasegawa
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Patent number: 4497895Abstract: There is disclosed a method for preparing a silver halide photographic emulsion by use of an ammoniacal silver nitrate solution in a double-jet manner, characterized in that the method comprises the step of maintaining the ratio between the maximum and minimum solubility of the silver halide in a silver halide photographic emulsion at 3 or less after 1/10 of the total amount of the solution containing silver halide has been used.The method according to the present invention provides a monodispersed silver halide photographic emulsion which has a high sensitivity, i.e., which comprises silver halide having a relatively large crystal size.Type: GrantFiled: July 30, 1982Date of Patent: February 5, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Syoji Matsuzaka, Takeo Koitabashi, Yoshihiro Haga, Akio Suzuki, Hiroaki Shiozawa
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Patent number: 4495277Abstract: Surface-sensitized silver halide grains having a core/shell structure show improved properties.Type: GrantFiled: August 1, 1983Date of Patent: January 22, 1985Assignee: Agfa-Gevaert AktiengesellscaftInventors: Manfred Becker, Sieghart Klotzer, Erik Moisar
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Patent number: 4493888Abstract: 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: GrantFiled: July 15, 1983Date of Patent: January 15, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsusuke Endo, Eiichi Kato, Nobutaka Ohki, Takatoshi Ishikawa