Patents by Inventor John M. Buchanan
John M. Buchanan 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: 5840470Abstract: Silver bromide color negative films can be rapidly processed using shortened color development times and specific amounts of color developing agent and bromide ion. After development, and optionally desilvering or fixing, the developed film is scanned to form density representative digital signals for the color records. These signals are then digitally manipulated to correct both interimage interactions and gamma mismatches around the color records to produce a digital record that is capable of providing a display image having desired aim color and tone scale reproduction. That digital record can then be stored or used to provide corrected display images, such as color prints, using output display devices.Type: GrantFiled: July 7, 1997Date of Patent: November 24, 1998Assignee: Eastman Kodak CompanyInventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
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Patent number: 5837433Abstract: A color corrected display image can be rapidly provided by color developing an imagewise exposed, duplitized color photographic element, scanning the developed image to form digital signals, and digitally manipulating those signals to correct either interimage interactions and/or gamma mismatches among at least two color recording units. The color corrected image can be provided in any desired form. The duplitized elements have at least one light-sensitive silver halide imaging layer on each side of the support.Type: GrantFiled: November 20, 1997Date of Patent: November 17, 1998Assignee: Eastman Kodak CompanyInventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
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Patent number: 5747228Abstract: A color corrected display image can be rapidly provided by color developing an imagewise exposed, duplitized color photographic element, scanning the developed image to form digital signals, and digitally manipulating those signals to correct either interimage interactions and/or gamma mismatches among at least two color recording units. The color corrected image can be provided in any desired form. The duplitized elements have at least one light-sensitive silver halide imaging layer on each side of the support.Type: GrantFiled: April 7, 1997Date of Patent: May 5, 1998Assignee: Eastman Kodak CompanyInventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
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Patent number: 5744288Abstract: A color image can be rapidly provided by color developing an imagewise exposed, duplitized color photographic element that has an ISO of at least 25. The duplitized elements have at least one light sensitive silver halide imaging layer or color recording unit on each side of the support.Type: GrantFiled: April 7, 1997Date of Patent: April 28, 1998Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Anne E. Bohan, Richard P. Szajewski
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Patent number: 5698379Abstract: Silver chloride color negative films can be rapidly processed using shortened color development times and specific amounts of color developing agent and bromide ion. After development, and optionally desilvering or fixing, the developed film is scanned to form density representative digital signals for the color records. These signals are then digitally manipulated to correct both interimage interactions and gamma mismatches around the color records to produce a digital record that is capable of providing a display image having desired aim color and tone scale reproduction. That digital record can then be stored or used to provide corrected display images, such as color prints, using output display devices.Type: GrantFiled: October 15, 1996Date of Patent: December 16, 1997Assignee: Eastman Kodak CompanyInventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
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Method of processing originating and display photographic elements using common processing solutions
Patent number: 5618656Abstract: An improved image forming method is disclosed which comprises contacting both an originating photographic element and a display photographic element with substantially similar processing solutions. The originating photographic element is characterized in that it contains at least 50 mole percent silver chloride grains and no more than 2 mole percent silver iodide, based on total silver forming the grain projected area. The grains are tabular grains bounded by {100} faces having adjacent edge ratios of less than 100 and each having an aspect ratio of at least 2.Type: GrantFiled: April 20, 1995Date of Patent: April 8, 1997Assignee: Eastman Kodak CompanyInventors: Richard P. Szajewski, John M. Buchanan -
Patent number: 5582958Abstract: A photographic bleaching or bleach/fixing composition contains a water-soluble ternary complex of an iron ion, a polycarboxylate ligand, and a second ligand which has at least one carboxyl group on an aromatic nitrogen heterocycle, such as a pyridinecarboxylic acid. Preferred materials are biodegradable, but all of the ternary complexes can be used in a variety of bleach or bleach/fix processes to good advantage as bleaching agents. They are particularly suitable for use in rehalogenating ferric chelate bleaches.Type: GrantFiled: January 10, 1995Date of Patent: December 10, 1996Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Eric R. Brown, Stuart T. Gordon
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Patent number: 5536625Abstract: This invention provides an accelerator for peracid bleaches used for bleaching silver halide photographic elements. The accelerator is a complex of ferric (Fe III) ion and a 2-pyridinecarboxylic acid or a 2,6-pyridinecarboxylic acid. The accelerator may be contained in the bleaching solution, a solution preceding the bleaching solution or in the photographic elements themselves.Type: GrantFiled: March 20, 1995Date of Patent: July 16, 1996Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Stuart T. Gordon, Keith H. Stephen, Richard P. Szajewski, Sidney J. Bertucci
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Patent number: 5521056Abstract: A photographic peracid bleaching composition contains a peracid bleaching agent, and a water-soluble ternary complex of ferric ion, a polycarboxylate ligand, and a second ligand which has at least one carboxyl group on an aromatic nitrogen heterocycle, such as a pyridinecarboxylic acid. These complexes act as catalysts for the peracid bleaching agent. Preferred complexes are biodegradable, but all of the ternary complexes can be used in a variety of peracid bleaching processes to good advantage.Type: GrantFiled: January 10, 1995Date of Patent: May 28, 1996Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Eric R. Brown, Stuart T. Gordon
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Patent number: 5464728Abstract: This invention provides a method of processing a developed high iodide color silver halide photographic element by bleaching the element with a peracid bleach and fixing the element with a fixer containing sodium cation and thiosulfate, wherein the amount of ammonium ion in the fixer is less than 1.4M.Type: GrantFiled: December 29, 1992Date of Patent: November 7, 1995Assignee: Eastman Kodak CompanyInventors: Richard P. Szajewski, John M. Buchanan
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Patent number: 5460924Abstract: This invention provides an accelerator for peracid bleaches used for bleaching silver halide photographic elements. The accelerator is a complex of ferric (Fe III) ion and a 2-pyridinecarboxylic acid or a 2,6-pyridinecarboxylic acid. The accelerator may be contained in the bleaching solution, a solution preceding the bleaching solution or in the photographic elements themselves.Type: GrantFiled: April 20, 1994Date of Patent: October 24, 1995Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Stuart T. Gordon, Keith H. Stephen, Richard P. Szajewski, Sidney J. Bertucci
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Patent number: 5451491Abstract: A method of desilvering an imagewise and developed color silver halide element, said method comprising bleaching the photographic element with a peracid bleach and subsequently contacting the photographic element with a fixer solution comprising thiosulfate anion and sodium cation;wherein the Molar-minute fixing Time is less than about 0.2 Molar-minutes.times.m.sup.2 /g Ag.times.the grams of incorporated silver per square meter of the photographic element.Type: GrantFiled: February 22, 1994Date of Patent: September 19, 1995Assignee: Eastman Kodak CompanyInventors: Richard P. Szajewski, John M. Buchanan
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Patent number: 5443943Abstract: Unique imagewise exposed and developed originating color silver halide photographic elements can be processed with bleaching and/or fixing solutions. The element is characterized by several important features. It contains a silver halide grain population of at least 50 mole percent chloride, based on total silver forming the grain population projected area, wherein at least 50 percent of total grain projected area is accounted for by intrinsically stable tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10, and (2) an aspect ratio of at least 2. Also, at least 50 mole % of the element silver halide is silver chloride, and no more than 2 mole % silver iodide. It also contains a bleach accelerator releasing compound. The element is also free of a desilvering rate retarding amount of a development inhibitor releasing compound having a free sulfur valence which binds to silver.Type: GrantFiled: March 22, 1993Date of Patent: August 22, 1995Assignee: Eastman Kodak CompanyInventors: Richard P. Szajewski, John M. Buchanan
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Patent number: 5242783Abstract: A novel blocked photographically useful compound element and process are based on a new blocking group that comprises a beta-ketocarbonyl group that is part of a 5- to 7-member heterocyclic ring containing a hetero-atom not adjacent to the beta-ketocarbonyl group. Such a blocked photographically useful compound provides a photographic material and process enabling more rapid release of the photographically useful group upon processing.Type: GrantFiled: July 23, 1992Date of Patent: September 7, 1993Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Gary S. Proehl
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Patent number: 5055385Abstract: There are described color photographic elements containing novel release compounds which rapidly release a photographically useful group, such as a development inhibitor, from a timing group.Type: GrantFiled: March 15, 1991Date of Patent: October 8, 1991Assignee: Eastman Kodak CompanyInventors: Wojciech Slusarek, John M. Buchanan, Philip T. S. Lau
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Patent number: 5034311Abstract: There are described color photographic elements containing novel release compounds which rapidly release a photographically useful group, such as a development inhibitor, from a timing group.Type: GrantFiled: November 16, 1990Date of Patent: July 23, 1991Assignee: Eastman Kodak CompanyInventors: Wojciech Slusarek, John M. Buchanan, Philip T. S. Lau, David T. Southby
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Patent number: 5019492Abstract: A novel blocked photographically useful compound comprises a new blocking group that (a) comprises two electrophilic groups, the least electrophilic of which is bonded directly or through a timing group to the photographically useful group (PUG) of the compound, (b) is capable of reacting with a dinucleophile reagent, and (c) has the two electrophilic groups separated from each other by a bond or unsubstituted or substituted atom that enables nucleophilic displacement to occur with release of PUG when the compound is reacted with a dinucleophile reagent. Such a blocked photographically useful compound is useful in a photographic material and process to provide increased stability and enable more rapid release of the photographically useful group upon reaction with a dinucleophile reagent.Type: GrantFiled: April 26, 1989Date of Patent: May 28, 1991Assignee: Eastman Kodak CompanyInventors: John M. Buchanan, Ewell R. Cook, Jared B. Mooberry, Gary S. Proehl, Stephen P. Singer, William N. Washburn
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Patent number: 4857440Abstract: Photographic compound (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement exhibits increased resistance to hydrolysis when the compound contains in a coupling position a coupling-off group represented by the formula: ##STR1## wherein Q, R.sub.q, R.sub.1, R.sub.2, R.sub.3, n and PUG are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process.Type: GrantFiled: June 30, 1988Date of Patent: August 15, 1989Assignee: Eastman Kodak CompanyInventors: William J. Begley, Michael J. Carmody, John M. Buchanan
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Patent number: 4847185Abstract: Photographic compounds capable of releasing a photographically useful group (PUG) by means of an intramolecular nucleophilic displacement provide increased image acutance when a coupling-off group in the coupling position of the compound is a group of the formula: ##STR1## wherein PUG is a photographically useful group; Q is N or C--R where R is hydrogen or a substituent that does not adversely affect imaging; and Z represents atoms completing a non-aromatic, heterocyclic ring. The photographic compounds are useful in photographic materials and processes.Type: GrantFiled: June 30, 1988Date of Patent: July 11, 1989Assignee: Eastman Kodak CompanyInventors: William J. Begley, Michael J. Carmody, John M. Buchanan
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Patent number: 4747823Abstract: A cholangiogram cannula of flexible plastics has an enlarged olive close to its patient end. A transparent sleeve of polyethylene is a close sliding fit along the cannula between the olive and a connector at the machine end of the cannula. The cannula is graduated along its length, the graduations being visible through the sleeve. In use, the sleeve is slid forwards against the olive to provide a reinforced gripping site by which the cannula can be gripped between finger and thumb or by forceps. The patient end of the cannula is manipulated into an incision made in the cystic duct and the sleeve is then slid rearwardly and the cystic duct sealed about the cannula to the rear of the olive.Type: GrantFiled: June 18, 1986Date of Patent: May 31, 1988Inventor: John M. Buchanan