Patents by Inventor Hoang Mai Trankiem
Hoang Mai Trankiem 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: 9027443Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit that includes a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.Type: GrantFiled: November 22, 2010Date of Patent: May 12, 2015Assignee: The Gillette CompanyInventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin Leslie Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph Allan DePuydt, Cinzia Simonis de Cloke, Alan Crook
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Publication number: 20110120973Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit comprising a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.Type: ApplicationFiled: November 22, 2010Publication date: May 26, 2011Inventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin Leslie Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph Allan DePuydt, Cinzia Simonis de Cloke, Alan Crook
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Patent number: 7882640Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit comprising a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.Type: GrantFiled: March 29, 2006Date of Patent: February 8, 2011Assignee: The Gillette CompanyInventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin Leslie Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph Allan DePuydt, Cinzia Simonis de Cloke, Alan Crook
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Patent number: 7448135Abstract: Multi-blade razors are provided, having blades with differing properties. In one aspect, a razor is provided that includes a safety razor blade unit comprising a guard, a cap, and first, second and third blades with parallel sharpened edges located between the guard and cap with the first blade closest to the cap, the third blade furthest from the cap, and the second blade disposed between the first and third blades, the blades having first, second and third tip radii, respectively, at least two of the three blades having different tip radii, and at least two of the blades having different coefficients of friction.Type: GrantFiled: March 29, 2006Date of Patent: November 11, 2008Assignee: The Gillette CompanyInventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin L. Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph A. DePuydt, Alan Crook, Cinzia Simonis Cloke
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Publication number: 20070227009Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit comprising a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.Type: ApplicationFiled: March 29, 2006Publication date: October 4, 2007Inventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin L. Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph A. DePuydt, Cinzia Simonis Cloke
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Patent number: 7247249Abstract: Methods treating razors blade cutting edges having an adherent polyfluorocarbon coated thereon are described. The coated razor blade edges are treated with a solvent, which partially removes the coating from the razor blade edge. Addition of an antioxidant to the solvent improves the effectiveness of the treatment.Type: GrantFiled: January 11, 2005Date of Patent: July 24, 2007Assignee: The Gillette CompanyInventor: Hoang Mai Trankiem
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Patent number: 6866894Abstract: A razor blade including a substrate with a cutting edge defined by a sharpened tip and adjacent facets, a layer of hard coating on the cutting edge, an overcoat layer of a chromium containing material on the layer of hard carbon coating, and an outer layer of polytetrafluoroethylene coating over the overcoat layer. Also disclosed is a method of making a razor blade including providing a substrate with a cutting edge defined by a sharpened tip and adjacent facets, and applying an aqueous solution including polytetrafluoroethylene coating over the sharpened tip to result in an outer layer, the polytetrafluoroethylene having a molecular weight of about 45,000.Type: GrantFiled: July 10, 2002Date of Patent: March 15, 2005Assignee: The Gillette CompanyInventors: Hoang Mai Trankiem, Michael J. Paretchan, Colin Clipstone, Steve Syng-Hi Hahn, Neville Sonnenberg, Charles White, Andrew Zhuk, Kevin P. McDonough
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Publication number: 20030096060Abstract: A razor blade including a substrate with a cutting edge defined by a sharpened tip and adjacent facets, a layer of hard coating on the cutting edge, an overcoat layer of a chromium containing material on the layer of hard carbon coating, and an outer layer of polytetrafluoroethylene coating over the overcoat layer. Also disclosed is a method of making a razor blade including providing a substrate with a cutting edge defined by a sharpened tip and adjacent facets, and applying an aqueous solution including polytetrafluoroethylene coating over the sharpened tip to result in an outer layer, the polytetrafluoroethylene having a molecular weight of about 45,000.Type: ApplicationFiled: July 10, 2002Publication date: May 22, 2003Inventors: Hoang Mai Trankiem, Michael J. Paretchan, Colin Clipstone, Steve Syng-Hi Hahn, Neville Sonnenberg, Charles White, Andrew Zhuk, Kevin P. McDonough
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Patent number: 6228428Abstract: A method of forming a polyfluorocarbon coating on a razor blade cutting edge comprises subjecting a fluorocarbon polymer having a molecular weight of at least 1,000,000 in dry powder form to ionizing irradiation to reduce the molecular weight of the polymer forming a dispersion of the irradiated polymer in a volatile organic liquid, spraying the dispersion on to a razor blade cutting edge, and heating the coating obtained to sinter the polyfluorocarbon. The polyfluorocarbon preferably is polytetrafluoroethylene and irradiation preferably is effected to obtain a telomer having a molecular weight of about 25,000.Type: GrantFiled: April 28, 1994Date of Patent: May 8, 2001Assignee: The Gillette CompanyInventor: Hoang Mai Trankiem
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Patent number: 5985459Abstract: The present invention relates to razor blade cutting edges which exhibit an improvement in the first shave. Conventional razor blade cutting edges exhibit surprisingly high initial cutting forces. Razor blades produced according to the present process exhibit significantly lower initial cutting forces which correlates with a more comfortable first shave. Improved blades according to the present invention involve treating conventional razor blade cutting edges having an adherent polyfluorocarbon coating with a solvent to partially remove some of the coating. Preferred solvents include perfluoroalkanes, perfluorocycloalkanes, perfluoropolyethers having a critical temperature or boiling point above the dissolution temperature for the polyfluorocarbon in the solvent. The present invention also relates to the method of producing these razor blade cutting edges.Type: GrantFiled: October 31, 1996Date of Patent: November 16, 1999Assignee: The Gillette CompanyInventors: Michael J. Kwiecien, Hoang Mai Trankiem, Charles Robert Parent, John L Howard
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Patent number: 5645894Abstract: The present invention relates to a method of forming a polyfluorocarbon coating on a razor blade cutting edge comprising the steps of: dispersing a fluorocarbon polymer in a supercritical fluid; coating said razor blade cutting edge with the dispersion; and heating the coating sufficiently to adhere the fluorocarbon polymer to the blade edge.Type: GrantFiled: January 17, 1996Date of Patent: July 8, 1997Assignee: The Gillette CompanyInventor: Hoang Mai Trankiem