Patents by Inventor Oanh V. Pham
Oanh V. Pham 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: 10698138Abstract: A diffuser including opposing structured first and second major surfaces is described. The first major surface includes a first plurality of surface structures providing a uniform first haze. The second major surface includes a first portion adjacent an edge and a second portion adjacent the first portion. The first portion includes a first region and a second region between the first region and the second portion. The second major surface includes a second plurality of surface structures providing a uniform second haze over the second portion and providing a third haze in the first portion. The third haze in the first region is higher than the second haze, and the third haze in the second region is monotonically decreasing. The second portion has a surface area of at least 90 percent of a surface area of the second major surface.Type: GrantFiled: April 14, 2016Date of Patent: June 30, 2020Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Gary T. Boyd, Tri D. Pham, Nicholas A. Johnson, Oanh V. Pham, Sara S. Merritt, Stephen J. Etzkorn, Haiyan Zhang, Corey D. Balts, Joseph T. Aronson
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Publication number: 20180217300Abstract: A diffuser including opposing structured first and second major surfaces is described. The first major surface includes a first plurality of surface structures providing a uniform first haze. The second major surface includes a first portion adjacent an edge and a second portion adjacent the first portion. The first portion includes a first region and a second region between the first region and the second portion. The second major surface includes a second plurality of surface structures providing a uniform second haze over the second portion and providing a third haze in the first portion. The third haze in the first region is higher than the second haze, and the third haze in the second region is monotonically decreasing. The second portion has a surface area of at least 90 percent of a surface area of the second major surface.Type: ApplicationFiled: April 14, 2016Publication date: August 2, 2018Inventors: Gary T. Boyd, Tri D. Pham, Nicholas A. Johnson, Oanh V. Pham, Sara S. Merritt, Stephen J. Etzkorn, Haiyan Zhang, Corey D. Balts, Joseph T. Aronson
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Publication number: 20040198602Abstract: Non-photosensitive thermographic materials have a support and thermally sensitive imaging layer(s) and an outermost conductive layer on either or both sides of the support. The outermost conductive layer comprises non-acicular metal antimonate particles dispersed in a hydrophobic binder and is provided from a non-aqueous solvent-based formulation.Type: ApplicationFiled: April 7, 2003Publication date: October 7, 2004Applicant: Eastman Kodak CompanyInventor: Oanh V. Pham
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Patent number: 6689546Abstract: Thermally developable materials that comprise a support have at least two backside layers. One of these layers can be a protective layer comprising a film-forming polymer. The materials also includes a non-imaging backside conductive layer comprising non-acicular metal antimonate particles in a mixture of two or more polymers that includes a first polymer serving to promote adhesion of the backside conductive layer directly to the support or other layers, and a second polymer that is different than and forms a single phase mixture with the first polymer.Type: GrantFiled: November 26, 2002Date of Patent: February 10, 2004Assignee: Eastman Kodak CompanyInventors: Gary E. LaBelle, Kumars Sakizadeh, Thomas J. Ludemann, Aparna V. Bhave, Oanh V. Pham
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Patent number: 5275927Abstract: Photothermographic articles containing interfacial barriers comprising a layer of a polymeric organic acid containing carboxyl and/or sulfo groups in direct contact with an adjacent layer comprising a basic polymer capable of forming hydrogen bonds with the polymeric organic acid are disclosed. A crosslinked barrier is formed at the interface between the layers which has substantial impermeability to chemical diffusion.Type: GrantFiled: July 16, 1992Date of Patent: January 4, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Oanh V. Pham, Thomas J. Ludemann
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Patent number: 5275932Abstract: Thermal recording material containing a suitable substrate coated with an image forming layer. The image forming layer contains a thermally reducible source of silver, a 3-indazolinone or urea compound; a polymeric binder; and optionally, an auxiliary reducing agent and toner. Preferably, an anti-stick layer is coated on top of the imaging layer.The 3-indazolinone and urea compounds have been found to enhance the thermal image forming capability of thermal recording material.Type: GrantFiled: July 22, 1992Date of Patent: January 4, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: David C. Weigel, Oanh V. Pham
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Patent number: 5041368Abstract: Radiation sensitive thermally developable imaging elements comprise:(a) photosensitive silver halide,(b) light insensitive silver salt oxidizing agent,(c) reducing agent for silver ions, and(d) an antifoggant or speed enhancing compound comprising iodophthalazinone compounds. The antifoggants are effective in reducing spurious background image densities.Type: GrantFiled: June 7, 1990Date of Patent: August 20, 1991Assignee: Minnesota Mining and Manufacturing CompanyInventor: Oanh V. Pham
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Patent number: 4751176Abstract: Method for preparing photosensitive silver halide crystals. A binder resin, a source of halide ions, and a source of silver ions are dissolved in an organic solvent, e.g., ethanol. Silver halide nuclei will then form. Additional source of halide ions and additional source of silver ions can be added to the solution in incremental additions, so that the initially-formed silver halide nuclei will grow. Upon removal of the solvent, the silver halide crystals will exist in a dry state, entrapped in the binder resin. Silver halide crystals formed and grown in this manner can be used to prepare photothermographic imaging compositions, which compositions will exhibit higher speed than photothermographic imaging compositions containing silver halide crystals grown according to conventional methods.Type: GrantFiled: September 6, 1985Date of Patent: June 14, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Oanh V. Pham
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Patent number: 4743534Abstract: Method for preparing photosensitive silver halide crystals. A binder resin, a source of halide ions, and a source of silver ions are dissolved in an organic solvent, e.g., ethanol. Silver halide nuclei will then form. Additional source of halide ions and additional source of silver ions can be added to the solution in incremental additions, so that the initially-formed silver halide nuclei will grow. Upon removal of the solvent, the silver halide crystals will exist in a dry state, entrapped in the binder resin. Silver halide crystals formed and grown in this manner can be used to prepare photothermographic imaging compositions, which compositions will exhibit higher speed than photothermographic imaging compositions containing silver halide crystals grown according to conventional methods.Type: GrantFiled: November 8, 1985Date of Patent: May 10, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Oanh V. Pham