Patents by Inventor Leif P. Olson
Leif P. Olson 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: 7282468Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a catechol borate compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing.Type: GrantFiled: July 18, 2005Date of Patent: October 16, 2007Assignee: Carestream Health Inc.Inventors: Kumars Sakizadeh, Peter J. Cowdery-Corvan, Leif P. Olson, David R. Whitcomb
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Patent number: 7166421Abstract: Black-and-white, aqueous-based, silver halide-containing photothermographic materials have increased stability both prior to use and after imaging with the incorporation of at least 0.005 g/m2 of a tetrafluoroborate salt.Type: GrantFiled: December 29, 2004Date of Patent: January 23, 2007Assignee: Eastman Kodak CompanyInventors: Sharon M. Simpson, Kumars Sakizadeh, Leif P. Olson
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Patent number: 7163786Abstract: Ionic liquids are added to black-and-white direct thermographic materials to provide increased image density or to allow for reduced silver coverage (that is, improved silver efficiency). Useful ionic liquids include imidazolium, pyrazolium, pyridinium, pyrimidinium, pyrazinium, tetra-alkylammonium, or tetra-alkylphosphonium cations.Type: GrantFiled: September 23, 2005Date of Patent: January 16, 2007Assignee: Eastman Kodak CompanyInventors: Kumars Sakizadeh, Leif P. Olson, Peter J. Cowdery-Corvan, Takuzo Ishida, David R. Whitcomb
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Patent number: 7135432Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a specific ortho-amino-phenol, para-amino-phenol, or hydroquinone compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing. The materials are characterized by their calculated aqueous deprotonation and their calculated anion HOMO energies.Type: GrantFiled: December 15, 2004Date of Patent: November 14, 2006Assignee: Eastman Kodak CompanyInventors: David R. Whitcomb, Leif P. Olson, Peter J. Cowdery-Corvan, Kumars Sakizadeh, Takuzo Ishida
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Patent number: 6838233Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N?C(SH)— group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: GrantFiled: March 3, 2004Date of Patent: January 4, 2005Assignee: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Publication number: 20040197714Abstract: Silver is recovered from aqueous silver-bearing compositions such as seasoned photographic bleach-fixing compositions or other photoprocessing effluent that comprise certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)— group. The presence of these compounds in the silver-bearing compositions provides effective silver recovery, extended life for the silver recovery apparatus, and reduced maintenance.Type: ApplicationFiled: April 23, 2004Publication date: October 7, 2004Applicant: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Leif P. Olson, Susan M. Flavin, Dominick Vacco, Dennis M. Long, Jay E. Mathewson
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Publication number: 20040180303Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)— group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: ApplicationFiled: March 3, 2004Publication date: September 16, 2004Inventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Patent number: 6790600Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)—group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: GrantFiled: February 7, 2003Date of Patent: September 14, 2004Assignee: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Publication number: 20040157172Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)— group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: ApplicationFiled: February 7, 2003Publication date: August 12, 2004Applicant: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Patent number: 6620562Abstract: The present invention is directed to a method of scanning silver-halide-containing color photographic and photothermographic film. In particular, the present invention comprises a photographic element comprising at least one infrared imaging dye-forming agent in a blue-sensitive color layer of the element, thereby forming at least one image record in the infrared region of the imagewise exposed and developed element. This expedient leads to the formation of high quality images when scanning photographic elements in which the silver halide, metallic silver, and/or any organic silver salts have not been removed.Type: GrantFiled: August 13, 2001Date of Patent: September 16, 2003Assignee: Eastman Kodak CompanyInventors: James H. Reynolds, David H. Levy, Robert W. Kulpinski, Leif P. Olson, Wojciech K. Slusarek
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Patent number: 6599684Abstract: The present invention is directed to a photothermographic element comprising at least one imaging layer with a pyrrolotriazole coupler and a developing agent, or precursor thereof, the combination of which is capable of forming an image record in the infrared region of the light spectrum in response to a selected hue of visible light. This expedient leads to the formation of high quality images, especially when scanning photothermographic elements in which the silver halide, metallic silver, and/or any organic silver salts have not been removed. Also disclosed is a method for photothermographically forming a developed image comprising an infrared image record.Type: GrantFiled: August 13, 2001Date of Patent: July 29, 2003Assignee: Eastman Kodak CompanyInventors: James H. Reynolds, Leif P. Olson, Wojciech K. Slusarek, David H. Levy
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Patent number: 6586166Abstract: This invention involves use of ionic liquids as addenda in a photothermographic system. The presence of an ionic liquid was found to increase image density. A preferred ionic liquid comprises an organic cation associated with a suitable anion, which ionic liquid melts at a temperature of 50° C. or less.Type: GrantFiled: November 21, 2001Date of Patent: July 1, 2003Assignee: Eastman Kodak CompanyInventors: Leif P. Olson, James H. Reynolds
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Publication number: 20030073044Abstract: The present invention is directed to a photothermographic element comprising at least one imaging layer with a pyrrolotriazole coupler and a developing agent, or precursor thereof, the combination of which is capable of forming an image record in the infrared region of the light spectrum in response to a selected hue of visible light. This expedient leads to the formation of high quality images, especially when scanning photothermographic elements in which the silver halide, metallic silver, and/or any organic silver salts have not been removed. Also disclosed is a method for photothermographically forming a developed image comprising an infrared image record.Type: ApplicationFiled: August 13, 2001Publication date: April 17, 2003Inventors: James H. Reynolds, Leif P. Olson, Wojciech K. Slusarek, David H. Levy
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Publication number: 20030068568Abstract: The present invention is directed to a method of scanning silver-halide-containing color photographic and photothermographic film. In particular, the present invention comprises a photographic element comprising at least one infrared imaging dye-forming agent in a blue-sensitive color layer of the element, thereby forming at least one image record in the infrared region of the imagewise exposed and developed element. This expedient leads to the formation of high quality images when scanning photographic elements in which the silver halide, metallic silver, and/or any organic silver salts have not been removed.Type: ApplicationFiled: August 13, 2001Publication date: April 10, 2003Inventors: James H. Reynolds, David H. Levy, Robert W. Kulpinski, Leif P. Olson, Wojciech K. Slusarek
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Patent number: 6531273Abstract: This invention involves dispersions comprising ionic liquids and a non-ionic surfactant, optionally further comprising a photographically useful compound such as a dye-forming coupler. Such dispersions form coatings that are relatively free of physical defects, and show reduced problems such as crystallization of components like the couplers or ion pairs.Type: GrantFiled: November 21, 2001Date of Patent: March 11, 2003Assignee: Eastman Kodak CompanyInventors: Leif P. Olson, John W. Boettcher, James H. Reynolds
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Patent number: 6531270Abstract: This invention involves the use of ionic liquids as coupler solvents in a color or monochrome photothermographic system. The presence of an ionic liquid can increase the amount of density or dye formed. The ionic liquid may be combined with other coupler solvents.Type: GrantFiled: November 21, 2001Date of Patent: March 11, 2003Assignee: Eastman Kodak CompanyInventors: Leif P. Olson, James H. Reynolds
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Patent number: 6517981Abstract: A light-sensitive silver-halide color photothermographic element comprises a typically magenta dye-forming pyrazolone coupler in the cyan record by rendering the hue of the resultant dye a cyan hue. The use of certain para-phenylenediamine developers, for example, containing a substituent group in both the 2- and 6-positions (ortho, ortho') relative to the coupling nitrogen, along with selected magenta dye-forming couplers, when oxidized, yield cyan dyes with certain couplers, resulting in the superior non-hue characteristics of magenta couplers in the cyan layer. By means of the present invention, light sensitive color photothermographic elements can form image dye records of consistent density forming ability and consistent stability in all three color records. Also disclosed is a method of processing such a color photographic element.Type: GrantFiled: August 16, 2001Date of Patent: February 11, 2003Assignee: Eastman Kodak CompanyInventors: Leif P. Olson, Wojciech K. Slusarek, James H. Reynolds, Richard P. Szajewski