Having Imbedded Baffle Or Flow Distributor Patents (Class 96/107)
  • Patent number: 8986543
    Abstract: A chromatography column distribution system (101) comprises a set of first bed support ribs (107) extending radially from a inner, first radial position (R1) near the centre of the plate to a outer radial position nearer to the periphery (109) of the plate and at least one set of intermediate bed support ribs (117, 119) starting at an intermediate radial position (R2, R3) and extending to an outer radial position nearer to the periphery (109) of the plate (101), whereby channels are formed between adjacent bed support ribs (107, 117, 119).
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: March 24, 2015
    Assignee: GE Healthcare Bio-Sciences Corp.
    Inventor: Klaus Gebauer
  • Publication number: 20140349839
    Abstract: The invention relates to a monolithic porous material based on amorphous silica or activated alumina or on one of their mixtures, the material comprising substantially rectilinear capillary ducts that lie parallel to one another, and being intended to be used as packing in a chromatography column, characterised in that: the ducts have, relative to one another, a substantially uniform cross section; the cross-section of each duct is uniform over its entire length; the ducts pass right through the material; the volume of micropores smaller than 0.3 nm is smaller than 50% of the total porous volume of the material.
    Type: Application
    Filed: September 17, 2012
    Publication date: November 27, 2014
    Inventor: Francois Parmentier
  • Patent number: 7850929
    Abstract: An internal static mixing system such as a disperser of mesh wire or expanded metal co-knit with a multi filament material selected from inert polymers, catalytic polymers, catalytic metals or mixtures in combination with a vertical reactor having a reaction zone and the disperser disposed in said reaction zone, particularly for carrying out paraffin alkylation using acid catalyst is disclosed. The wire mesh provides the structural integrity of the system as well as the open space required in reactors for the movement of vapors and liquids though the system. The disperser may be in sheets, bundles or bales or positioned within a frame.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: December 14, 2010
    Assignee: Catalytic Distillation Technologies
    Inventors: Lawrence A. Smith, Jr., Abraham P. Gelbein, John R. Adams
  • Patent number: 7534345
    Abstract: A chromatography column distribution system (101) comprises a set of first bed support ribs (107) extending radially from a inner, first radial position (R1) near the centre of the plate to a outer radial position nearer to the periphery (109) of the plate and at least one set of intermediate bed support ribs (117, 119) starting at an intermediate radial position (R2, R3) and extending to an outer radial position nearer to the periphery (109) of the plate (101), whereby channels are formed between adjacent bed support ribs (107, 117, 119).
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: May 19, 2009
    Assignee: GE Healthcare Bio-Sciences AB
    Inventor: Klaus Gebauer
  • Publication number: 20090107339
    Abstract: An apparatus for treating gas by using a filler is provided, for example, using an agent for detoxicating a waste gas which includes toxic substances such as silane, phosphine, hydrogen chloride, dichlorosilane, ammonia and/or various gases used in a semiconductor manufacturing process, a liquid crystal display element manufacturing process or the like. A detoxicating agent layer is provided in a flow path within a gas treating column, and ring-shaped baffle plates are provided so as to contact the upstream surface and the downstream surface of the detoxicating agent layer, with the outer edge of the baffle plate making contact with the wall of the flow path. A width of the baffle plate is set to not smaller than five times the outer diameter of the filler and not larger than 9% of the inner diameter of the gas treating column when the outer diameter di of the filler and inner diameter D of the gas treating column satisfy a relation of 5di?0.
    Type: Application
    Filed: March 24, 2006
    Publication date: April 30, 2009
    Inventors: Yukihiro Aizawa, Tooru Nagasaka
  • Patent number: 6942794
    Abstract: The present invention is a flow distributor and integral bed support for a chromatography column. The flow distributor has an outlet extending through it and a bottom face across which is secured a bed support. The bottom face has a series of ribs extending radially outward from a center portion of the face. The bed support is secured to the flow distributor about its outer periphery and this amount of available surface area of the flow distributor and/or face that is used to secure the bed support is less than about 10%. A distribution disk is arranged over the inlet and extends across from about 1 to about 30% of the flow distributor's surface area, ending just short of the inner edge of the ribs closest to the center point of the flow distributor face. This disk is mounted on two or more legs so as to be of substantially the same height as the ribs. The disk projects the fluid flow in a 360° radial distribution without any noticeable partitioning.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: September 13, 2005
    Assignee: Millipore Corporation
    Inventors: Michael Titus, Aaron Noyes, Ian Rayner, Chris Antoniou
  • Patent number: 6920777
    Abstract: An apparatus, system and method reduce the cool down time of GC ovens by supplying larger volumes of air through oven intake ducts. The system and method provide intake cross-sheets in an oven intake duct to reduce airflow spin, increasing the flow rate of fresh air into the GC oven and reducing the overall cool-down time of the GC oven. In addition, because the improved airflow allows the oven wall temperature to quickly match the oven air temperature, the noise in the temperature signal may be reduced. As a result, the GC oven can reach an equilibrium “ready” state faster. Furthermore, the utilization of the cross-sheets may allow for flexibility in the design of a fast GC oven—specifically in the location and shape of the intake duct—without loss of performance. This flexibility may become increasingly significant as GC ovens continue on the trend of becoming smaller and faster.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: July 26, 2005
    Assignee: Agilent Technologies, Inc.
    Inventor: Sammye Miller
  • Patent number: 6666907
    Abstract: A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating element and temperature sensing on the microfabricated column. Additionally, means are provided to thermally isolate the heated column from their surroundings. The small heat capacity and thermal isolation of the microfabricated column improves the thermal time response and power consumption, both important factors for portable microanalytical systems.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: December 23, 2003
    Assignee: Sandia Corporation
    Inventors: Ronald P. Manginell, Gregory C. Frye-Mason
  • Patent number: 6663697
    Abstract: A new class of miniaturized gas chromatographic columns has been invented. These chromatographic columns are formed using conventional micromachining techniques, and allow packed columns having lengths on the order of a meter to be fabricated with a footprint on the order of a square centimeter.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: December 16, 2003
    Assignee: Sandia Corporation
    Inventors: Richard Kottenstette, Carolyn M. Matzke, Gregory C. Frye-Mason
  • Patent number: 6527951
    Abstract: A chromatography column with filters having minimal volume. A stamped screen disk is coated with fluorocarbon polymer on both sides, leaving a center area open. The fluorocarbon polymer coating serves as a gasket, providing reliable sealing for pressure up to approximately 10000 psi. The chromatography column comprises a fitting having an internal cavity. A fluorocarbon polymer coated screen is placed within the cavity. A threaded capillary tubing is screwed inside the cavity. At the end of the capillary lies a compression screw solvent tubing connection.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: March 4, 2003
    Assignee: Waters Investments Limited
    Inventor: Yuri Tuvim
  • Patent number: 6326189
    Abstract: The sample vessel 1 comprises plurality of vessels 1a. The vessel 1a comprises an opening for sample inlet 3, a liquid sample outlet 4, and a silicon oxide composite particles structural body 2 is arranged at the bottom of the vessel 1a, i.e. the liquid sample outlet 4. The silicon oxide composite particles structural body 2 is a structural body composed of a composite made of plural silicon oxide particles having smaller diameter combined with a resin particle having larger diameter. Accordingly, even if the diameter of the silicon oxide particles 7 is set small in order to maintain the nucleic acid combination ability high, the presence of the resin particles 6 having a large diameter makes it possible to ensure the liquid conduction path, and the nucleic acid separating vessel, which is capable of suppressing decrease of the B/F separating velocity with maintaining the nucleic acid combining ability high can be realized.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: December 4, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Shinichi Fukuzono, Tetsuo Yokoyama, Yukiko Ikeda, Yoshishige Endo
  • Patent number: 6224760
    Abstract: A chromatography column having an end arrangement including an end plate having a fluid opening and a filter extending over an internal surface of the end plate to define a fluid flow zone between them into which the fluid flow opens is disclosed. There is a liner between the end plate's internal surface and the filter layer. The liner has a surface relief pattern to space the filter layer from the end plate and maintain the fluid flow zone across the filter.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: May 1, 2001
    Inventors: John Davies, Gerald James Spencer, Owe Persson
  • Patent number: 6224762
    Abstract: Device (DME) or panel for collecting, distributing, mixing or drawing off several fluids, at least one main fluid and at least two secondary fluids, that comprises at least: means for collecting a main fluid (3, 9), at least two injection and/or draw-off rails (6, 7) that allow the passage of secondary fluids, at least two mixing chambers (11a, 11b) that communicate with injection and/or draw-off rails (6, 7) with orifices or passages (6i, 7i), means (12, 4) for redistributing the fluid that is obtained from said mixing chambers, means (5a, 5b) for separating collecting and redistributing means and draw-off rails (6, 7) are arranged one above the other, and mixing chambers (11a, 11b) are arranged on both sides of the rails and symmetrically relative to the orifices that have an injection function.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: May 1, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Gilles Ferschneider, Jean-Christophe Viguie, Olivier Callebert, Frédéric Hoffmann
  • Patent number: 6093317
    Abstract: Injection or extraction device that comprises at least one injection or extraction rail 2 that is integral with a chamber 1 for injecting a fluid F2 into a zone Z1 or for extracting a fluid F1 from zone Z1 in which said fluid circulates, whereby the rail comprises at least one orifice 3 that makes it possible for fluid F2 to pass into zone Z1 or for said fluid F1 to be extracted from zone Z1 and that in front of each orifice comprises at least one means 5 for at least partial blocking of the orifice, whereby the means is located downstream or upstream from the rail in the direction of circulation of fluid F2 and that makes it possible for fluid F2 to pass into zone Z1 or for said fluid F1 to be extracted from zone Z1. Use of the device for monitoring the injection or extraction of a first fluid in the simultaneous presence of a second fluid that is different from the first fluid.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: July 25, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Marianne Capelle, Roland Huin
  • Patent number: 6068684
    Abstract: A novel chromatograph is provided. The chromatograph includes an analytical column which is a channel with a rectangular cross-section. Integrated with the chromatograph are a sample collection channel and a restriction channel. The column, sample collection channel, and restriction are all part of a single unitary microstructure. The microstructure is manufactured by irradiating and etching a material subject to synchronized x-ray radiation. The device will either be made of the actual etched material, or the etched material will be used as a mold or model to fabricate the chromatograph. A method of using the device is also disclosed.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: May 30, 2000
    Assignee: Board of Supervisors of Louisiana State University and Agricultural & Mechanical College
    Inventor: Edward B. Overton
  • Patent number: 6024871
    Abstract: Disclosed is a single-phase fluid distributor-mixer-extractor for separating beds of granular solids used in chromatography. The distributor includes a device for adding or removing a secondary fluid. The distributor further includes at least one calibrated orifice having a geometry designed to create a sufficient pressure drop to confine fluid turbulence inside a mixing chamber.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: February 15, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Isabelle Harter, Denis Darmancier, Pierre Renard
  • Patent number: 5972214
    Abstract: The invention is a column for separating a substance from a liquid having a plurality of separable compounds. The column has at least a first and a second bed of granular solids separated by at least one device, the device has at least a collection device which collects the substance to be separated, the collection device being in fluid connection to at least one mixing chamber, at least a first circuit for injection and/or removal of a first secondary fluid B.sub.1 and at least a second injection and/or removal circuit of a second secondary fluid B.sub.2. The injection and/or removal circuits are in communication with the mixing chamber with at least one opening allowing passage of the secondary fluids B.sub.1, B.sub.2 into the mixing chamber.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: October 26, 1999
    Assignee: Institut Francais du Petrole
    Inventors: Olivier Callebert, Jean-Paul Dessapt, Annick Pucci, Pierre Renard
  • Patent number: 5846411
    Abstract: Disclosed is a single-phase fluid distributor-mixer-extractor for separating beds of granular solids used in chromatography. The distributor includes a device for adding or removing a secondary fluid. The distributor further includes at least one calibrated orifice having a geometry designed to create a sufficient pressure drop to confine fluid turbulence inside a mixing chamber.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: December 8, 1998
    Assignee: Institute Francais du Petrole
    Inventors: Isabelle Harter, Denis Darmancier, Pierre Renard
  • Patent number: 5755960
    Abstract: A device for distributing, mixing, injecting, and/or removing several fluids, one of the fluids being a main fluid A.sub.1, and at least a first secondary fluid B.sub.1 and a second secondary fluid B.sub.2, said device having means (3, 4) for collecting said main fluid A.sub.1, said collecting means being related to at least one mixing chamber having at least one wall substantially parallel to the device axis circuit (12, 5) of a first secondary fluid B.sub.1, and at least a second injection and/or removal circuit (13, 6) of a second secondary fluid B.sub.2, said injection and/or removal circuits being in communication with the mixing chamber (7) by means of one or more openings (15, 16) allowing passage of said secondary fluids B.sub.1 and B.sub.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: May 26, 1998
    Assignee: Institut Francais du Petrole
    Inventors: Olivier Callebert, Jean-Paul Dessapt, Annick Pucci, Pierre Renard
  • Patent number: 5324426
    Abstract: In a chromatography column one or more of the end plates defining the column are provided with specially designed lands and grooves to more effectively uniformly distribute the input liquid over the column cross-sectional area and thus improve the separation of sample components, the upper end wall of the column being adjustably positionable to vary the axial length of the column by means of novel structure including readily releasable speed nuts engageable with externally threaded rods, the seal between the movable upper plate and the column wall being so designed as to minimize dead space and thus further increase separating power, and the structure for adjustably positioning said top wall includes elements enabling that structure and the top wall connected thereto to be conveniently supported in inverted condition when separated from the remainder of the column structure.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: June 28, 1994
    Assignee: Kontes Glass Corp.
    Inventors: Thomas Joseph, Alfred J. Pearson, Robert C. Adams, Omar A. Swift
  • Patent number: 4169733
    Abstract: Process for forming high-contrast silver images which comprises treating a light-sensitive silver halide photographic material provided with a hydrophilic colloidal layer containing a silver halide emulsion layer coated on a support and containing a tetrazolium compound, after imagewise exposure, with a developer and/or a processing solution prior to the developing, both of which contains at least a nitrogen-containing heterocyclic compound substituted with at least mercapto, thioketone or thioether group.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: October 2, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Tateshi Iytaka, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
  • Patent number: 4168976
    Abstract: A photographic element comprising a support, a layer containing certain photographically useful fragments and a layer containing a dye mordant composition comprising a polymer having recurring units of the formula: ##STR1## wherein: A comprises polymerized units of ethylenically unsaturated monomers;R is H or alkyl;R.sup.1 is H, alkyl or is a group containing at least one atomatic nucleus;Q is a linking group;Y is H or an inert group;X is a leaving group;E and F are the atoms necesary to complete a 5-7 membered heterocyclic ring;N is 0 to 2;M is 1 to 3;P is 0 or 1;X is 0 to 90 weight percent; andY is 10 to 100 weight percent of the polymer.The polymeric mordants covalently bond with dyes or dye precursors and are especially useful in diffusion transfer processes.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: September 25, 1979
    Assignee: Eastman Kodak Company
    Inventors: Gerald A. Campbell, Lewis R. Hamilton
  • Patent number: 4168977
    Abstract: A negative image silver halide photographic emulsion comprising substantially surface latent image-type silver chlorobromide or silver chlorobromoiodide grains with an iodide content of up to about 7 mol%, wherein the mean grain size of the silver halide grains is not greater than about 0.7.mu., a binder is present in an amount of not more than about 250 g per mol of silver halide, and at least one compound represented by the following general formula (I):r.sup.1 nhnhcho (i)wherein R.sup.1 represents an aryl group.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: September 25, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shunji Takada, Yoshitaka Akimura, Hiroyuki Mifune, Nobuyuki Tsujino
  • Patent number: 4168167
    Abstract: Presensitized printing plates for lithographic printing which comprise an aluminum support having an anodically oxidized aluminum oxide film thereon and a light-sensitive layer containing internal latent image type silver halide grains which are not fogged on the anodically oxidized aluminum oxide film on the support.
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: September 18, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Haruo Takenaka, Keisuke Shiba, Kikuo Kubotera, Akira Kashiwabara
  • Patent number: 4166742
    Abstract: A silver halide photographic light-sensitive material containing at least one negative image silver halide photographic emulsion layer comprising silver halide grains that have an average grain size of not more than about 0.7 .mu. and are substantially of the surface latent image type and containing a binder in an amount of not more than about 250 g per mol of silver halide, and containing a compound represented by the following general formula (I):r.sup.1 nhnhcor.sup.2 (i)wherein R.sup.1 represents an aryl group; and R.sup.2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms; in at least one of the hydrophilic colloid layers, and a compound represented by the following general formula (II) or (III): ##STR1## wherein Y represents a sulfur atom, a selenium atom, an oxygen atom, a nitrogen atom or a divalent residue; --NR.sup.4 --, wherein R.sup.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: September 4, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroyuki Mifune, Shunji Takada, Yoshitaka Akimura, Tadao Shishido
  • Patent number: 4165986
    Abstract: Photosensitive substituted-halide silver halide emulsions are prepared by substituting bromide and/or iodide anions for part of the chloride anions of a silver iodochloride emulsion. These substituted-halide silver halide emulsions are particularly useful as negative working silver halide emulsions in diffusion transfer processes.
    Type: Grant
    Filed: July 27, 1973
    Date of Patent: August 28, 1979
    Assignee: Polaroid Corporation
    Inventor: Vivian K. Walworth
  • Patent number: 4160669
    Abstract: The present invention relates to a silver halide photographic emulsion and particularly to a silver halide photographic emulsion spectrally sensitized for argon laser beam exposure having an improved high spectral sensitivity to flash exposure using flash rays having main emission peaks at wave lengths of 514.5 nm, 488.0 nm and 476.5 nm (argon laser rays).
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: July 10, 1979
    Inventors: Teiji Habu, Tomio Nakajima, Eiichi Sakamoto, Noboru Fujimori, Kiyomitsu Mine
  • Patent number: 4154616
    Abstract: A silver halide photographic emulsion containing at least one sensitizing dye represented by the following general formula (I), ##STR1## in which Z represents an atomic group necessary for forming a benzoxazole nucleus or a naphthoxazole nucleus; R.sub.1 represents an aliphatic group; R.sub.2 represents an alkyl group, an allyl group or an aryl group; R.sub.3 represents a 2-(2-hydroxyethoxy)-ethyl group, a 2-(2-acyloxyethyoxy)-ethyl group, an N-(N,N-dialkylaminoalkyl)carbamoylalkyl group, an N-(N,N,N-trialkylammoniumalkyl)carbamoylalkyl group or an N,N,N-trialkylammoniumalkyl group; X represents an acid anion; and n represents 0 or 1.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: May 15, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Sato, Akira Ogawa, Masanao Hinata, Haruo Takei
  • Patent number: 4150993
    Abstract: A process for forming a direct positive image by developing, after imagewise exposure to an internal latent image type light-sensitive silver halide photographic material, with a surface developer for silver halide, which process comprises incorporating at least one fogging agent selected from hydrazine compounds, N-substituted cycloammonium salts and benzimidazole derivatives in combination with an amineborane compound into said light-sensitive silver halide photographic material, said surface developer and/or a treating bath used prior to the treatment by said surface developer.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: April 24, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Tsuneo Suga, Keiji Ogi, Kenji Egami
  • Patent number: 4146399
    Abstract: Photographic additives in particular water-insoluble photographic additives are rendered easier to incorporate into photographic layers by finely dividing them, mixing them with a finely divided water soluble substance and compressing the resulting mixture into the form of a tablet. The tablets which contain from about 1 to 50% by weight of the photographic additives are then dissolved in the coating composition and this disperses the water insoluble additive uniformly throughout the coating composition.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: March 27, 1979
    Assignee: Ciba-Geigy AG
    Inventors: Roy Trunley, Howard R. Hopwood
  • Patent number: 4145218
    Abstract: Process for developing light-sensitive silver halide photographic materials with a developing solution in the presence of one or more of sulfur-containing amine compounds.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: March 20, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Teiji Habu, Masashi Nakano, Yasuo Tsuda, Eiichi Sakamoto, Hiroshi Yamada
  • Patent number: 4144069
    Abstract: An image forming method comprising development processing a silver halide photographic material in the presence of at least one block copolymer represented by the following general formula (I):y[(ch.sub.2 ch.sub.2 ch.sub.2 ch.sub.2 o).sub.m --(CH.sub.2 CH.sub.2 O).sub.n --R].sub.x (I)and/or the general formula (II):ho(ch.sub.2 ch.sub.2 o).sub.a (CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.b (CH.sub.2 CH.sub.2 O).sub.c H (II)wherein Y represents an organic residue of x valence; R represents a hydrogen atom or an alkyl group containing 1 to 18 carbon atoms; m is an integer of from 5 to 50; n is an integer of from 10 to 100; b is an integer of from 8 to 50; a + e ranges from 5 to 100; and the polyoxyethylene moieties therein comprise about 10 to about 70% by weight of the total weight of the compound; and x represents an integer of from 1 to 3.
    Type: Grant
    Filed: March 8, 1977
    Date of Patent: March 13, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Yoneyama, Noriyuki Inoue, Nobuo Tsuji, Kimitaka Kameoka
  • Patent number: 4140531
    Abstract: Ultraviolet radiation sensitive photographic film material comprising a silver halide emulsion of at least 50 mole % silver chloride and a yellow filter dye over said silver halide emulsion layer.
    Type: Grant
    Filed: August 31, 1976
    Date of Patent: February 20, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Peter B. Jamieson
  • Patent number: 4139387
    Abstract: Positive images including color images are obtained by imagewise exposure and development of a material which comprises at least one light-sensitive silver halide emulsion layer which contains an unfogged direct-positive silver halide emulsion, when the development is carried out in the presence of a fogging agent of the formula ##STR1## wherein the symbols are defined as hereinafter. The fogging agent is preferably contained in a layer of the material and more preferably in the unfogged direct-positive silver halide emulsion layer. For the production of color instant images the material may also contain non-diffusible color providing compounds capable in their oxidized form of being split under alkaline photographic development conditions to release diffusible dyes.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: February 13, 1979
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Anita von Konig, Heinrich Odenwalder, Manfred Peters, Walter Puschel
  • Patent number: 4131470
    Abstract: A process for the stabilization of and the prevention or substantial reduction of fogging in the use of photographic silver halide emulsions, characterized in that compounds selected from the group consisting of those represented by the general formulas I, II, and III: ##STR1## are added to the emulsion, before or during chemical sensitization and before coating of the emulsions onto a support therefor, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as herein described.
    Type: Grant
    Filed: December 21, 1976
    Date of Patent: December 26, 1978
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Gunther Fischer, Beate Wenzel, Steffen Scheithauer, Udo Franz, Karl-Wilhelm Junge, Christof Schroter, Siegfried Gahler, Johannes Morgenstern
  • Patent number: 4126472
    Abstract: A method of producing a lithographic photosensitive material comprising adding a water soluble iridium compound to the photographic emulsion in a ratio of about 10.sup.-6 to 10.sup.-4 mole per mole of the silver halide at the first or second ripening procedure of a silver halide photographic emulsion containing at least 60 mole% silver chloride, further adding a hydroxytetrazaindene compound and a polyoxyethylene compound to the photographic emulsion and coating the photographic emulsion on a support.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: November 21, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeo Sakai, Tadashi Ogawa
  • Patent number: 4120726
    Abstract: An improved photographic silver-halide emulsion containing a sensitizer additive which is an asymmetrical disulfide of the formula(W).sub.a (X).sub.b A--S--S--B(Y).sub.c (Z).sub.dwherein:A and B are each aryl, alkyl or aralkyl radicals,X and Y are each carboxyl or alkoxycarbonyl groups,W and Z are each amino groups which may be alkylated or acylated,a, b, c, d are each 0 to 3 anda + d .gtoreq. 1 and b + c .gtoreq. 1.
    Type: Grant
    Filed: August 12, 1977
    Date of Patent: October 17, 1978
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Gerhard Hanisch, Gunther Fischer, Seigfried Gahler, Udo Franz, Karl Kuschel, Roland Mayer, Gunther Bach, Karl-Wilhelm Junge
  • Patent number: 4116697
    Abstract: Photographic silver halide emulsions which have their sensitivity increased by the addition of sulfur-substituted isothioureas of the formula; ##STR1## where R, R.sub.2, and R.sub.3 are organic radicals and R.sub.1 is an organic radical or H.
    Type: Grant
    Filed: January 20, 1978
    Date of Patent: September 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Howard Bigelow
  • Patent number: 4115122
    Abstract: A direct positive silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer of the internal latent image type and being capable of forming a direct positive image, in which at least one hydrophilic colloid layer contains at least one heterocyclic quaternary salt compound represented by the following general formula (I) ##STR1## wherein Z represents an atomic group necessary for forming a 5- or 6-membered heterocyclic nucleus, R.sub.1 represents an aliphatic group, R.sub.2 represents a hydrogen atom or an aliphatic group, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, an aliphatic group, an alkoxy group, a hydroxy group or an aromatic group, and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a propargyl group, a butynyl group or a substituent containing a propargyl or butynyl group, X.crclbar.
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: September 19, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiichi Adachi, Tadashi Ikeda, Nobuyuki Tsujino
  • Patent number: 4115129
    Abstract: Photographic colloid-silver halide emulsions are chemically sensitized by digestion at pH.gtoreq. 7 and the addition prior to or during digestion of at least one organophosphine sulfide of the general formula: ##STR1## WHEREIN (A) R is individually selected from the group consisting of hydrogen and a monovalent organic radical; m is 0, 1 or 2; and not more than one of said R's is hydrogen when m is 0; X represents a group having the formula: ##STR2## wherein Z is a divalent organic radical, n is 0 or 1, or (B) X.sub.m and R.sub.3-m together comprise a single trivalent heterocyclic radical.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: September 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Howard Bigelow
  • Patent number: 4110116
    Abstract: New cyanine dyes derived from di-halogen-benzoxazoles and benzothiazoles are desensitizers for silver halide negative emulsions and useful electron acceptor spectral sensitizers for direct positive silver halide emulsions.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: August 29, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Paolo Beretta, Luigi Valbusa
  • Patent number: 4108661
    Abstract: A photographic material is described for making positive images by reversal processing, the material comprising a support and a silver halide Lippmann-emulsion layer the average silver halide grain-size of which is less than 100 nm wherein the grains have been chemically sensitized to fog so that a test portion of the emulsion when coated on a support at a coverage of silver halide corresponding to from about 3 g to about 7 g of silver nitrate per sq.m. gives a density between about 0.20 and about 0.70 upon development without exposure for 6 min at 20.degree. C in a developer of the composition:Hydroquinone: 16.5 gPotassium bromide: 1.7 gSodium salt of EDTA: 1.7 gPotassium metabisulphite: 40 g1-phenyl-5-mercaptotetrazole: 35 gSodium hydroxide and water to make: 1 liter at pH 11.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: August 22, 1978
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Willy Joseph Vanassche, Herman Adelbert Philippaerts, Rene Omer Duville, Francois Leon Schelfaut
  • Patent number: 4097285
    Abstract: A direct-positive photographic silver halide emulsion which is spectrally sensitized with a cyanine dye in which the position 2 or 4 of a 1,8-naphthyridine ring is joined through the position 2 of a thiazole ring through a methine linkage is disclosed. Said emulsion has no decreasing tendency of the maximum density and shows no color stain due to the remains of the dye. Photographic elements employing such emulsion are also disclosed.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: June 27, 1978
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Akira Tanaka, Akio Yoshida
  • Patent number: 4097284
    Abstract: A method for spectrally sensitizing a silver halide photographic emulsion with a supersensitizing combination as hereinafter described, wherein the combination of a trimethinecyanine dye and a nitrogen-containing heterocyclic compound having a mercapto group, which is capable of producing a slightly soluble silver salt by reacting with a silver ion, is incorporated in the emulsion in a supersensitizing amount.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: June 27, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Tadaaki Tani
  • Patent number: 4095982
    Abstract: A development method which comprises developing a silver halide photographic ligh-sensitive material in the presence of a compound represented by the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represent a hydrogen atom, alklyl group, alkenyl group, aralkyl group or aryl group, X represents an anion, and P is 1 or 2.
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: June 20, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Yoneyama, Isao Shimamura, Shinzo Kishimoto, Kazunori Hasebe
  • Patent number: 4094684
    Abstract: Photographic emulsions and elements are disclosed containing composite silver halide crystals. The composite crystals are comprised of multi-faceted, radiation-receptive silver iodide crystals having a minimum mean diameter of at least 0.1 micron and silver chloride crystals forming epitaxial junctions with the silver iodide crystals. At least half of the facets of the silver iodide crystals are substantially free of epitaxial silver chloride. The silver chlorides are limited to less than 75 mole percent, based on the total silver halide forming the composite crystals.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: June 13, 1978
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 4094683
    Abstract: A direct positive silver halide light-sensitive material capable of forming direct positive images comprising a support having coated thereon at least one internal image type silver halide emulsion layer, wherein at least one hydrophilic colloid layer contains a heterocyclic quaternary salt compound represented by formula (I) in an amount necessary to provide the silver halide photographic emulsion with a fogging function. ##STR1## wherein Z is an atomic group necessary for completing a 5- or 6-membered heterocyclic nucleus, R.sub.1 is an aliphatic group, R.sub.2 is a hydrazonoalkyl group, X.crclbar. is an anion, and n is 1 or 2.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: June 13, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuyuki Tsujino, Akira Ogawa, Tadao Shishido, Keiichi Adachi
  • Patent number: 4092171
    Abstract: Photographic colloid-silver halide emulsions have their sensitivity increased by the addition of at least one organo-phosphine chelate of a palladium or platinum metal salt.
    Type: Grant
    Filed: February 20, 1976
    Date of Patent: May 30, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Howard Bigelow
  • Patent number: RE29930
    Abstract: Very high speed direct-positive photographic emulsions comprising silver halide grains fogged with both reduction and gold fogging agents are described. For some applications other fogging agents, e.g. compounds of metals more electropositive than silver, can be substituted for the gold fogging agent. Photographic elements employing such emulsions and processes for preparing them are also disclosed.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: March 13, 1979
    Assignee: Eastman Kodak Company
    Inventor: Bernard D. Illingsworth, deceased
  • Patent number: RE29974
    Abstract: .Iadd.Light-sensitive photographic direct positive silver salt emulsions for use in photographic elements are disclosed. The emulsions contain silver salt grains, typically silver halide grains. The silver salt grains are comprised of a core containing centers which promote the deposition of photolytic silver and a shell covering the core. The shell is fogged and develops to silver without exposure. .Iaddend.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: April 24, 1979
    Assignee: Eastman Kodak Company
    Inventor: Robert W. Berriman