Patents by Inventor Bhaskar V. Velamakanni
Bhaskar V. Velamakanni 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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Publication number: 20130137065Abstract: Provided are methods of improving the wear resistance and aesthetic properties of dental articles though use of ceramics and microparticles, as well as dental articles having an abrasion resistant microparticle and ceramic coating thereon.Type: ApplicationFiled: August 8, 2011Publication date: May 30, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Bhaskar V. Velamakanni, Todd D. Jones
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Publication number: 20130130203Abstract: Provided are methods of improving the wear resistance and aesthetic properties of dental articles, as well as dental articles having an abrasion resistant polymeric coating thereon.Type: ApplicationFiled: August 8, 2011Publication date: May 23, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Bhaskar V. Velamakanni, Todd D. Jones, Sumita B. Mitra, Anupa N. Patel
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Patent number: 8329674Abstract: Film forming dental compositions comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof, and a binder. The film forming dental compositions can include an amino sugar, a derivative of an amino sugar, or a pharmaceutically acceptable salt thereof, and can be useful in inhibiting biofilm formation in an oral cavity.Type: GrantFiled: July 10, 2008Date of Patent: December 11, 2012Assignee: 3M Innovative Properties CompanyInventors: Jie Yang, Bhaskar V. Velamakanni, Sumita B. Mitra, Alphonsus V. Pocius, John J. Stofko, Jr., Jeremy M. Yarwood
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Patent number: 7855160Abstract: A catalyst ink is provided, comprising: 25-95% by weight water; 1-50% by weight of at least one solid catalyst, typically a highly dispersed platinum catalyst; 1-50% by weight of at least one polymer electrolyte in acid (H+) form; and 1-50% by weight of at least one polar aprotic organic solvent. The catalyst ink typically has a viscosity at 1 sec?1 of 10 Pa·sec or less. The catalyst ink typically does not ignite spontaneously when dried to completion in air at a temperature of 80° C. or greater. The catalyst ink may be used in the fabrication of membrane electrode assemblies for use in fuel cells.Type: GrantFiled: July 21, 2010Date of Patent: December 21, 2010Assignee: 3M Innovative Properties CompanyInventors: Bhaskar V. Velamakanni, David Robert Mekala, Eric Joseph Hanson
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Publication number: 20100285951Abstract: A catalyst ink is provided, comprising: 25-95% by weight water; 1-50% by weight of at least one solid catalyst, typically a highly dispersed platinum catalyst; 1-50% by weight of at least one polymer electrolyte in acid (H+) form; and 1-50% by weight of at least one polar aprotic organic solvent. The catalyst ink typically has a viscosity at 1 sec?1 of 10 Pa·sec or less. The catalyst ink typically does not ignite spontaneously when dried to completion in air at a temperature of 80° C. or greater. The catalyst ink may be used in the fabrication of membrane electrode assemblies for use in fuel cells.Type: ApplicationFiled: July 21, 2010Publication date: November 11, 2010Inventors: Bhaskar V. Velamakanni, David Robert Mekala, Eric Joseph Hanson
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Publication number: 20100150847Abstract: Dental compositions are provided comprising a compound of Formula (I) or a pharmaceutically acceptable salt thereof: wherein n is an integer from about 2 to about 5.Type: ApplicationFiled: July 10, 2008Publication date: June 17, 2010Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Jie Yang, Bhaskar V. Velamakanni, Sumita B. Mitra, Alphonsus V. Pocius, John J. Stofko, JR., Jeremy M. Yarwood
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Publication number: 20100130445Abstract: Film forming dental compositions are provided comprising a compound of the formula or a pharmaceutically acceptable salt thereof, and a binder.Type: ApplicationFiled: July 10, 2008Publication date: May 27, 2010Inventors: Jie Yang, Bhaskar V. Velamakanni, Simita B. Mitra, Alphonsus V. Pocius, John J. Stofko, JR., Jeremy M. Yarwood
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Publication number: 20100015578Abstract: Methods of using a dental composition having a photobleachable dye and an acidic component with a pKa of less than 4.5 are disclosed. The photobleachable dye is selected from the group consisting of aminoanthraquinone dyes, azo dyes, and combinations thereof. The aged color of the dental composition is substantially the same as the color of the dental composition immediately after hardening.Type: ApplicationFiled: December 12, 2007Publication date: January 21, 2010Inventors: Afshin Falsafi, Joel D. Oxman, Tiffany T. Ton, Joan V. Brennan, David K. Cinader, JR., Bhaskar V. Velamakanni, Sumita B. Mitra
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Patent number: 7247796Abstract: The present invention relates to a filler material useful for communication cables, such as electrical cables and optical cables. In one embodiment, (a) from about 50 to 95 percent by weight mineral oil; (b) less than about 10 percent by weight block copolymer selected from the group consisting of styrene-ethylene/butylene, styrene-ethylene/propylene, styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylene/butylene-styrene, styrene-ethylene/propylene-styrene, and combinations thereof; (c) less than about 35 percent by weight petroleum wax; (d) less than about 20 percent by weight hollow glass microspheres; and (e) less than about 10 percent by weight thixotropic agent selected from the group consisting of clay, colloidal metal oxide, fumed metal oxide, and combinations thereof.Type: GrantFiled: December 17, 2004Date of Patent: July 24, 2007Assignee: 3M Innovative Properties CompanyInventors: Nathan K. Hagen, David R. Hague, Chad D. Mistele, Mark E. Napierala, Mario A. Perez, Bhaskar V. Velamakanni, James K. Young
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Patent number: 7198560Abstract: A wafer polishing solution and method for polishing a wafer comprising an amino acid and calcium ions or barium ions. The wafer polishing solution can be adjusted to control cut rate and selectivity for modifying semiconductor wafers using a fixed abrasive CMP process.Type: GrantFiled: November 28, 2005Date of Patent: April 3, 2007Assignee: 3M Innovative Properties CompanyInventors: Christopher J. Rueb, Richard J. Webb, Bhaskar V. Velamakanni
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Patent number: 6997785Abstract: A wafer polishing solution and method for polishing a wafer comprising an amino acid and calcium ions or barium ions. The wafer polishing solution can be adjusted to control cut rate and selectivity for modifying semiconductor wafers using a fixed abrasive CMP process.Type: GrantFiled: December 23, 2004Date of Patent: February 14, 2006Assignee: 3M Innovative Properties CompanyInventors: Christopher J. Rueb, Richard J. Webb, Bhaskar V. Velamakanni
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Publication number: 20040107869Abstract: A catalyst ink is provided, comprising: 25-95% by weight water; 1-50% by weight of at least one solid catalyst, typically a highly dispersed platinum catalyst; 1-50% by weight of at least one polymer electrolyte in acid (H+) form; and 1-50% by weight of at least one polar aprotic organic solvent. The catalyst ink typically has a viscosity at 1 sec−1 of 10 Pa·sec or less. The catalyst ink typically does not ignite spontaneously when dried to completion in air at a temperature of 80° C. or greater. The catalyst ink may be used in the fabrication of membrane electrode assemblies for use in fuel cells.Type: ApplicationFiled: December 10, 2002Publication date: June 10, 2004Applicant: 3M Innovative Properties CompanyInventors: Bhaskar V. Velamakanni, David Robert Mekala, Eric Joseph Hanson
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Patent number: 6051630Abstract: A process and a high pressure apparatus are disclosed which are useful in preparing magnetic dispersions and other dispersions of hard, non-compliant particulates. The apparatus can be monitored for clogs and wear and allows for relatively quick and inexpensive replacement of orifices. The apparatus includes a high pressure pump and a series of impingement chambers comprising an input manifold where the process stream is split into two or more streams and an output manifold where the streams are recombined after passing through restrictive orifices configured in such a manner that the streams impinge on each other at high velocities. The orifices in each succeeding impingement zone are the same size or smaller than the orifices in the preceding impingement zone, and the orifices in the final impingement zone must be smaller than the orifices in the first impingement zone.Type: GrantFiled: October 12, 1998Date of Patent: April 18, 2000Assignee: 3M Innovative Properties CompanyInventors: Mark Serafin, Richard D. Olmsted, Richard M. Fuller, Bhaskar V. Velamakanni, Zvi Rogovin
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Patent number: 5852076Abstract: A process and a high pressure apparatus are disclosed which are useful in preparing magnetic dispersions and other dispersions of hard, non-compliant particulates. The apparatus can be monitored for clogs and wear and allows for relatively quick and inexpensive replacement of orifices. The apparatus includes a high pressure pump and a series of impingement chambers comprising an input manifold where the process stream is split into two or more streams and an output manifold where the streams are recombined after passing through restrictive orifices configured in such a manner that the streams impinge on each other at high velocities. The orifices in each succeeding impingement zone are the same size or smaller than the orifices in the preceding impingement zone, and the orifices in the final impingement zone must be smaller than the orifices in the first impingement zone.Type: GrantFiled: November 7, 1997Date of Patent: December 22, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mark Serafin, Richard D. Olmsted, Richard M. Fuller, Bhaskar V. Velamakanni, Zvi Rogovin
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Patent number: 5741543Abstract: This invention relates to a process in which a composition is coated onto a substrate and crosslinked so as to form a PSA by means of polymerizing free radically polymerizable monomers from covalently attached pendent unsaturation in the polymer component of the composition. The coating can carried out by a wide variety of industrial methods because the process of the invention allows for compositions with a wide degree of possible viscosities.Type: GrantFiled: July 18, 1996Date of Patent: April 21, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Louis E. Winslow, Greggory S. Bennett, Gaddam N. Babu, Paul Hattam, Michael L. Tumey, Bhaskar V. Velamakanni
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Patent number: 5188780Abstract: A method of preparing dense ceramic product is described, wherein a coagulated network of ceramic powder particles in water is formed and then treated to increase the volume fraction of particles, thereby forming a water-saturated powder compact. The compact is formed into a desired shape and fired to provide the dense ceramic product. A coagulated network may advantageously be formed by mixing a ceramic powder with water at a pH that produces a net surface charge, to form a dispersed slurry and adding a sufficient amount of salt to the dispersed slurry to cause particles within the slurry to form the coagulated network.Type: GrantFiled: April 18, 1991Date of Patent: February 23, 1993Assignee: Regents of the University of CaliforniaInventors: Frederick F. Lange, Bhaskar V. Velamakanni
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Patent number: 5167271Abstract: The present invention relates to processes to produce ceramic reinforced and ceramic-metal matrix composite articles. More specifically, the invention concerns the use of pressure filtration to infiltrate a reinforcing organic or inorganic network with ceramic particles. Centrifugation is also used to separate the liquid form the slurry. After heating the reinforced ceramic article is produced. Pressure filtration is also used to infiltrate an organic polymer or organic fiber network with ceramic particles. The solvent is removed carefully followed by intermediate heating to remove the organic network without deforming the preform shape. After densification, the preform is heated and contacted with molten metal (optionally) with pressure to infiltrate the open channel network. Upon cooling the ceramic metal matrix composite is obtained. The reinforced matrix articles are useful in high temperature and high stress applications, e.g.Type: GrantFiled: October 20, 1988Date of Patent: December 1, 1992Inventors: Frederick F. Lange, Robert Mehrabian, Anthony G. Evans, Bhaskar V. Velamakanni, David C. Lam