Patents by Inventor David F. Jennings
David F. Jennings 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: 8507089Abstract: An article comprises one or more porous particles. Each porous particle comprises a polymer that provides a continuous solid phase including an external particle surface, and first and second discrete pores that are isolated from each other and dispersed within the continuous solid phase. The porous particle further comprises a first marker material present in the first discrete pores, and a second marker material that is detectably different from the first marker material and is present within the second discrete pores. The marker materials can provide a means for identifying documents, clothing, or other articles as genuine, and providing a detectable security system.Type: GrantFiled: January 4, 2011Date of Patent: August 13, 2013Assignee: Eastman Kodak CompanyInventors: Mridula Nair, David F. Jennings, Tamara K. Jones, Joseph S. Sedita, Myra T. Olm
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Patent number: 8507088Abstract: Polymeric porous particles have a continuous solid phase and at least two different internal pores that are isolated from each other within the continuous phase. At least one set of discrete pores contains a marker material, and some instances, each set of discrete pores contain different pores marker materials that are isolated from each other. These marker materials are detectably different from each other. The porous particles can be spherical or non-spherical and can be used in any situation where the detectably different marker materials can be evaluated.Type: GrantFiled: January 4, 2011Date of Patent: August 13, 2013Assignee: Eastman Kodak CompanyInventors: Mridula Nair, David F. Jennings, Tamara K. Jones, Joseph S. Sedita
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Publication number: 20120167666Abstract: An article comprises one or more porous particles. Each porous particle comprises a polymer that provides a continuous solid phase including an external particle surface, and first and second discrete pores that are isolated from each other and dispersed within the continuous solid phase. The porous particle further comprises a first marker material present in the first discrete pores, and a second marker material that is detectably different from the first marker material and is present within the second discrete pores. The marker materials can provide a means for identifying documents, clothing, or other articles as genuine, and providing a detectable security system.Type: ApplicationFiled: January 4, 2011Publication date: July 5, 2012Inventors: Mridula Nair, David F. Jennings, Tamara K. Jones, Joseph S. Sedita, Myra T. Olm
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Publication number: 20120171605Abstract: Polymeric porous particles have a continuous solid phase and at least two different internal pores that are isolated from each other within the continuous phase. At least one set of discrete pores contains a marker material, and some instances, each set of discrete pores contain different pores marker materials that are isolated from each other. These marker materials are detectably different from each other. The porous particles can be spherical or non-spherical and can be used in any situation where the detectably different marker materials can be evaluated.Type: ApplicationFiled: January 4, 2011Publication date: July 5, 2012Inventors: Mridula Nair, David F. Jennings, Tamara K. Jones, Joseph S. Sedita
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Patent number: 6759368Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.Type: GrantFiled: June 30, 2003Date of Patent: July 6, 2004Assignee: Eastman Kodak CompanyInventors: Mark Lelental, Henry J. Gysling, David F. Jennings
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Publication number: 20040092398Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.Type: ApplicationFiled: June 30, 2003Publication date: May 13, 2004Inventors: Mark Lelental, Henry J. Gysling, David F. Jennings
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Patent number: 6635601Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.Type: GrantFiled: August 1, 2002Date of Patent: October 21, 2003Assignee: Eastman Kodak CompanyInventors: Mark Lelental, Henry J. Gysling, David F. Jennings
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Publication number: 20030060365Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.Type: ApplicationFiled: August 1, 2002Publication date: March 27, 2003Inventors: Mark Lelental, Henry J. Gysling, David F. Jennings
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Patent number: 6509296Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.Type: GrantFiled: March 27, 2000Date of Patent: January 21, 2003Assignee: Eastman Kodak CompanyInventors: Mark Lelental, Henry J. Gysling, David F. Jennings
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Patent number: 6066445Abstract: A thermographic imaging element comprises:(a) a support;(b) an imaging layer comprising:(i) a silver salt;(ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.; and(iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq.cm.Type: GrantFiled: December 19, 1996Date of Patent: May 23, 2000Assignee: Eastman Kodak CompanyInventors: Thomas D. Weaver, David F. Jennings
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Patent number: 5994052Abstract: 1. A thermographic imaging element comprising: (a) a support; and(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent; and(iii) a second reducing agent comprising a boron compound containing at least one boron-hydrogen bond.Type: GrantFiled: March 20, 1998Date of Patent: November 30, 1999Assignee: Eastman Kodak CompanyInventors: Thomas D. Weaver, David F. Jennings
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Patent number: 5928856Abstract: A thermographic imaging element comprises:(a) a support;(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.;(iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq. cm.; and(iv) a third reducing agent comprising a boron compound containing at least one boron-hydrogen bond.Type: GrantFiled: March 20, 1998Date of Patent: July 27, 1999Assignee: Eastman Kodak CompanyInventors: Thomas D. Weaver, David F. Jennings
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Patent number: 5928855Abstract: A thermographic imaging element comprises:(a) a support;(b) an imaging layer comprising:(i) a silver salt;(ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.;(iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq. cm.; and(iv) a third reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.Type: GrantFiled: March 20, 1998Date of Patent: July 27, 1999Assignee: Eastman Kodak CompanyInventors: Thomas D. Weaver, David F. Jennings
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Patent number: 5922528Abstract: A thermographic imaging element comprising:(a) a support; and(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent; and(iii) a second reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.Type: GrantFiled: March 20, 1998Date of Patent: July 13, 1999Assignee: Eastman Kodak CompanyInventors: Thomas D. Weaver, David F. Jennings
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Patent number: 5534397Abstract: An imaging element for use in an electron-beam-recording process is comprised of a film support having, in order, on one side thereof a conductive layer comprising vanadium pentoxide, an adhesion-promoting hydrophilic colloid layer and an imaging layer. The imaging layer is comprised of an electron-beam-sensitive silver halide emulsion and the vanadium pentoxide is present in the conductive layer in an amount sufficient to impart thereto a resistivity of less than 5.times.10.sup.8 .OMEGA./sq. The imaging element is free of objectionable visual density, UV density and mottle and can be manufactured without the need for organic solvents.Type: GrantFiled: May 18, 1995Date of Patent: July 9, 1996Assignee: Eastman Kodak CompanyInventors: Charles C. Anderson, David A. Niemeyer, David F. Jennings
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Patent number: 5529884Abstract: A laser dye-ablative recording element comprising a support having on one side thereof a dye layer comprising an image dye dispersed in a polymeric binder, the dye layer having an infrared-absorbing material associated therewith to absorb at a given wavelength of the laser used to expose the element, the image dye being substantially transparent in the infrared region of the electromagnetic spectrum and absorbing in the region of from about 300 to about 700 nm and not having substantial absorption at the wavelength of the laser used to expose the element, and the other side of the support having thereon a conductive backing layer of resistivity <5.times.10.sup.12 .OMEGA./.quadrature..Type: GrantFiled: December 9, 1994Date of Patent: June 25, 1996Assignee: Eastman Kodak CompanyInventors: Lee W. Tutt, Charels C. Anderson, David F. Jennings, Glenn T. Pearce, Richard P. Henzel
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Patent number: 5518867Abstract: An electron-beam-recording process comprises the steps of (1) providing an electron-beam-recording element, (2) introducing the element into a vacuum chamber, (3) imagewise exposing the element within the vacuum chamber to an electron beam and (4) processing the imagewise-exposed element to form a visible image. The electron-beam-recording element comprises a film support having, in order, on one side thereof a conductive layer comprising vanadium pentoxide, an adhesion-promoting hydrophilic colloid layer and an imaging layer. The imaging layer is comprised of an electron-beam-sensitive silver halide emulsion and the vanadium pentoxide is present in the conductive layer in an amount sufficient to impart thereto a resistivity of less than 5.times.10.sup.8 .OMEGA./sq.Type: GrantFiled: February 27, 1995Date of Patent: May 21, 1996Assignee: Eastman Kodak CompanyInventors: Charles C. Anderson, David A. Niemeyer, David F. Jennings
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Patent number: 5380584Abstract: An electroconductive imaging element, that is especially useful in a high speed laser printing process utilizing electrostatography, is comprised of an insulating support, an electrically-conductive layer overlying the support and a thermoplastic dielectric imaging layer overlying the electrically-conductive layer. The electrically-conductive layer, which is comprised of at least 3 milligrams per square meter of a colloidal gel of vanadium pentoxide dispersed in a polymeric binder combines a high degree of transparency with a high degree of electrical conductivity. The thermoplastic dielectric imaging layer has a thickness of at least 0.2 micrometers and a surface resistivity of at least 10.sup.13 ohms/square and is comprised of a thermoplastic polymer with a glass transition temperature of at least 20.degree. C.Type: GrantFiled: May 21, 1993Date of Patent: January 10, 1995Assignee: Eastman Kodak CompanyInventors: Charles C. Anderson, David F. Jennings, Gerald M. Leszyk, David A. Niemeyer
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Patent number: 5376518Abstract: A photographic element that is useful as an imaging master in the field of graphic arts is comprised of a dimensionally-stable polyester film having a radiation-sensitive silver halide emulsion layer on one side thereof and having on the opposite side, in order, a latex subbing layer and a backing layer. The backing layer is comprised of gelatin, a matting agent, a filter dye and a blocked gelatin-hardening agent. In the manufacture of the photographic element, a high temperature heating step is employed to activate the blocked gelatin-hardening agent and thereby harden the backing layer.Type: GrantFiled: May 18, 1994Date of Patent: December 27, 1994Assignee: Eastman Kodak CompanyInventors: David F. Jennings, Charles C. Anderson, Benneth C. Onuh, Mario D. DeLaura
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Patent number: 5358834Abstract: A photographic element that is useful as an imaging master in the field of graphic arts is comprised of a dimensionally-stable polyester film having a radiation-sensitive silver halide emulsion layer on one side thereof and having on the opposite side, in order, a latex subbing layer and a backing layer. The backing layer is comprised of gelatin, a matting agent, a filter dye and a blocked gelatin-hardening agent. In the manufacture of the photographic element, a high temperature heating step is employed to activate the blocked gelatin-hardening agent and thereby harden the backing layer.Type: GrantFiled: September 23, 1993Date of Patent: October 25, 1994Assignee: Eastman Kodak CompanyInventors: David F. Jennings, Charles C. Anderson, Benneth C. Onuh, Mario D. DeLaura