Patents by Inventor Kanta Kumar
Kanta Kumar 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: 20120141752Abstract: A process to mark a multilayered article with a laser (20). The multilayered article (10) includes a laser-markable layer (14) having at least one organic polymer and at least one light-sensitive pigment therein, and including at least one release agent associated with the laser-markable layer. Laser-marking of the laser-markable layer is accomplished by directing laser radiation (22) into the multilayered article through the release agent (12) to induce an interaction between the light-sensitive pigment and the organic polymer. As a result of the interaction, a visually perceptible marking (16) is formed in the article. The laser-marked article includes a laser-markable layer and a first release agent associated with a surface of the laser-markable layer. The marking(s) in the laser-markable layer is visible through the layer of release agent, and the marking is a result of the laser-induced interaction between the light-sensitive pigment and the organic polymer.Type: ApplicationFiled: August 31, 2010Publication date: June 7, 2012Applicant: 3M Innovative Properties CompanyInventors: Pingfan Wu, Junkang Jacob Liu, Robert L.W. Smithson, Rachel M. Lucking, Panu K. Zoller, Jeffrey O. Emslander, Kanta Kumar
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Patent number: 7972670Abstract: A structured paper release liner (10) for use with an article (44) backed with a pressure sensitive adhesive, an adhesive-backed article assembly (42) and methods of making each are disclosed. The liner (10) comprises a piece of paper (14) having a release side free of a structural support layer, a back side, and a structured release surface (48) having a pattern formed into the paper (14) on the release side. A release material is on the structured release surface of the paper. The pattern formed in the paper (14) is designed so as to form fluid egress channels in a bonding surface of the pressure sensitive adhesive (46). The fluid egress channels define a structured bonding surface (48) having exit pathways for fluid to bleed out from behind the article when the structured bonding surface (48) is adhered to or otherwise disposed on a substrate.Type: GrantFiled: November 19, 2004Date of Patent: July 5, 2011Assignee: 3M Innovative Properties CompanyInventors: David S. Seitz, Kanta Kumar, Larry A. Meixner, Mieczyslaw H. Mazurek, Stefan O. Dietrich
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Publication number: 20100075135Abstract: An article including a first release liner with a first release surface, a second release liner with a second release surface, and a layer of a thermally conductive grease between the first and the second release surfaces. The thermally conductive grease includes a mixture of at least three distributions of thermally conductive particles, each of the at least three distributions of thermally conductive particles having an average (D50) particle size which differs from the other distributions by at least a factor of 5.Type: ApplicationFiled: March 7, 2008Publication date: March 25, 2010Inventors: Philip E. Kendall, Kanta Kumar
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Publication number: 20100028619Abstract: Tearable security laminates. More specifically, the present invention relates to a security card, comprising: a plastic card having edges; and a tearable security laminate attached to the plastic card by an adhesive layer, where the security laminate is tearable along an edge of the plastic card. In addition, the invention relates to methods of making security cards.Type: ApplicationFiled: September 11, 2006Publication date: February 4, 2010Inventors: John H. Ko, Kanta Kumar
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Patent number: 7620439Abstract: A conductive adhesive composition is provided and articles that include the adhesive composition as a component thereof. The conductive adhesive composition comprises: (a) pressure sensitive adhesive; (b) electrolyte comprising water soluble or water dispersible organic chloride; and (c) humectant. In some embodiments, the conductive adhesive composition is a bicontinuous composition comprising an aqueous phase and an oil phase, and the bicontinuous composition may be derived from a polymerizable microemulsion composition, the microemulsion composition comprising: an aqueous phase comprising one or more hydrophilic monomers or oligomers and/or one or more amphiphilic monomers or oligomers in water, the water-soluble or water-dispersible organic chloride, surfactant and humectant; and an oil phase comprising one or more hydrophobic monomers or oligomers. Biomedical articles such as biomedical electrodes, may incorporate the foregoing adhesive as a component.Type: GrantFiled: August 4, 2005Date of Patent: November 17, 2009Assignee: 3M Innovative Properties CompanyInventors: Vinod P. Menon, Kanta Kumar, Carl T. Nelson, Don A. Rizzardi
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Publication number: 20090053448Abstract: The invention features protective film constructions that may be used, for example, as a protective floor finish.Type: ApplicationFiled: October 12, 2005Publication date: February 26, 2009Applicant: 3M Innovative Properties CompanyInventors: Adriana Paiva, Jeffrey T. Anderson, Roy Wong, Susan K. Yarmey, Mark A. Strobel, Joel A. Getschel, Albert I. Everaerts, Gregory F. King, John T. Brady, Duane D. Fansler, Kanta Kumar, Jeffrey D. Malmer, Mario A. Perez, Deborah A. Strobel, Wendy L. Thompson, Michael C. Palazzotto, Stefan H. Gryska, Sharon Wang, Mikhail L. Pekurovsky, Mark F. Ellis, Edward G. Stewart, Robert M. Jennings, Gerald R.A. Hofmann, Kelly J. Gibbens, Gezahegn D. Damte, Jie Yang
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Publication number: 20090000727Abstract: A hardcoat film article comprises a cured hardcoat layer disposed on a release liner. The release liner comprises a release material formed by irradiating a release material precursor, wherein the release material precursor has a shear storage modulus of about 1×102 to about 3×106 Pa when measured at 20° C. and at a frequency of 1 Hz, and wherein the release material has a contact angle of 15° or more, as measured using a mixed solution of methanol and water (volume ratio 90:10) having a wet tension of 25.4 mN/m.Type: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Inventors: Kanta Kumar, John P. Baetzold, Michael A. Semonick
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Publication number: 20080039805Abstract: A patch application device wherein the patch is retained in position within the collar until delivery through contact of at least one obstruction inside the collar with a portion of an adhesive on the front surface (e.g., microneedle-containing surface) of the patch. The collar and patch can be used to form separate replaceable cartridges, and the combination can be provided as a kit.Type: ApplicationFiled: June 9, 2005Publication date: February 14, 2008Inventors: Franklyn L. Frederickson, Chad J. Carter, Kanta Kumar, Michael A. Semonick, David J. Wirtanen
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Publication number: 20070166501Abstract: A structured paper release liner (10) for use with an article (44) backed with a pressure sensitive adhesive, an adhesive-backed article assembly (42) and methods of making each are disclosed. The liner (10) comprises a piece of paper (14) having a release side free of a structural support layer, a back side, and a structured release surface (48) having a pattern formed into the paper (14) on the release side. A release material is on the structured release surface of the paper. The pattern formed in the paper (14) is designed so as to form fluid egress channels in a bonding surface of the pressure sensitive adhesive (46). The fluid egress channels define a structured bonding surface (48) having exit pathways for fluid to bleed out from behind the article when the structured bonding surface (48) is adhered to or otherwise disposed on a substrate.Type: ApplicationFiled: November 19, 2004Publication date: July 19, 2007Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: David Seitz, Kanta Kumar, Larry Meixner, Mieczyslaw Mazurek, Stefan Dietrich
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Publication number: 20070032719Abstract: A conductive adhesive composition is provided and articles that include the adhesive composition as a component thereof. The conductive adhesive composition comprises: (a) pressure sensitive adhesive; (b) electrolyte comprising water soluble or water dispersible organic chloride; and (c) humectant. In some embodiments, the conductive adhesive composition is a bicontinuous composition comprising an aqueous phase and an oil phase, and the bicontinuous composition may be derived from a polymerizable microemulsion composition, the microemulsion composition comprising: an aqueous phase comprising one or more hydrophilic monomers or oligomers and/or one or more amphiphilic monomers or oligomers in water, the water-soluble or water-dispersible organic chloride, surfactant and humectant; and an oil phase comprising one or more hydrophobic monomers or oligomers. Biomedical articles such as biomedical electrodes, may incorporate the foregoing adhesive as a component.Type: ApplicationFiled: August 4, 2005Publication date: February 8, 2007Inventors: Vinod Menon, Kanta Kumar, Carl Nelson, Don Rizzardi
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Publication number: 20040018790Abstract: The invention relates to methods of seaming sheeting or films including retroreflective sheeting and the corresponding articles. The method comprises providing at least two pieces of polymeric sheeting or film such as retroreflective sheeting, each piece having a viewing surface and an opposing surface, overlapping the two pieces along an edge such that the viewing surface of the first piece is in contact with the opposing surface of the second piece and the exposed viewing surface is in contact with a removable protective top film at least at the overlap, and forming a seam at the overlap.Type: ApplicationFiled: July 24, 2002Publication date: January 29, 2004Applicant: 3M Innovative Properties CompanyInventors: Kanta Kumar, Chester A. Bacon
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Patent number: 6677028Abstract: Retroreflective articles having multilayer films are useful for commercial graphics and retroreflective products, such as roll-up signs for highway transportation safety. The articles comprise multilayer films having at least one layer of polyurethane and at least one layer of a copolymer of alkylene and at least one non-acidic, polar co-monomer. Articles having the new multilayer films provide the same or improved performance, are less expensive, and offer improved methods for manufacturing, when compared to prior articles.Type: GrantFiled: August 10, 2000Date of Patent: January 13, 2004Assignee: 3M Innovative Properties CompanyInventors: James E. Lasch, Paul J. Wang, Raymond L. Lucking, Terry R. Bailey, Kanta Kumar, Michael A. Essien, Jeffrey D. Janovec, Jaime R. Ojeda, Michael D. Currens
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Patent number: 6562324Abstract: Cosmetic compositions are provided containing vinyl-silicone graft or block copolymers of the formulaType: GrantFiled: June 5, 1995Date of Patent: May 13, 2003Assignee: Minnesota Mining and ManufacturingInventors: Kanta Kumar, Ramesh C. Kumar, Smarajit Mitra
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Energy curable inks and other compositions incorporating surface modified, nanometer-sized particles
Patent number: 6467897Abstract: Compositions that incorporate relates to compositions that incorporate surface modified, nanometer sized, inorganic oxide particles into energy curable fluids. The surface modification aspect allows the compatibility between the particles and fluid to be controllably adjusted to achieve a wide range of rheological characteristics. For printing, preferred compositions have favorable dot gain and thickness build up. When the composition is cured, the presence of the particles also helps improve physical properties such as hardness, modulus, abrasion resistance, refractive index, and the like. The compositions are particularly well-suited for forming printed, radiation cured features on substrates such as paper, signs, walkways, roadways, motor vehicles, boats, aircraft, furniture, equipment, and the like.Type: GrantFiled: January 8, 2001Date of Patent: October 22, 2002Assignee: 3M Innovative Properties CompanyInventors: Dong Wu, Brant U. Kolb, Kevin M. Eliason, Kanta Kumar, Jennifer L. Lee, Bruce A. Nerad, Jessica L. Voss, Caroline M. Ylitalo -
ENERGY CURABLE INKS AND OTHER COMPOSITIONS INCORPORATING SURFACE MODIFIED, NANOMETER-SIZED PARTICLES
Publication number: 20020149659Abstract: Compositions that incorporate relates to compositions that incorporate surface modified, nanometer sized, inorganic oxide particles into energy curable fluids. The surface modification aspect allows the compatibility between the particles and fluid to be controllably adjusted to achieve a wide range of rheological characteristics. For printing, preferred compositions have favorable dot gain and thickness build up. When the composition is cured, the presence of the particles also helps improve physical properties such as hardness, modulus, abrasion resistance, refractive index, and the like. The compositions are particularly well-suited for forming printed, radiation cured features on substrates such as paper, signs, walkways, roadways, motor vehicles, boats, aircraft, furniture, equipment, and the like.Type: ApplicationFiled: January 8, 2001Publication date: October 17, 2002Inventors: Dong Wu, Brant U. Kolb, Kevin M. Eliason, Kanta Kumar, Jennifer L. Lee, Bruce A. Nerad, Jessica L. Voss, Caroline M. Ylitalo -
Patent number: 6265061Abstract: A retroreflective article comprising a substrate and a cured ceramer coating provided on at least a portion of a surface of the substrate. The coated portion of the surface is retroreflective and can be dew-resistant. The ceramer is derived from a free-radically-curable binder, colloidal inorganic oxide and fluoro/silane component comprising a hydrolyzable silane moiety and a fluorinated moiety.Type: GrantFiled: September 3, 1999Date of Patent: July 24, 2001Assignee: 3M Innovative Properties CompanyInventors: Soonkun Kang, John L. Ethen, Gregory E. Gilligan, Christopher J. Gustafson, Sithya Seda Khieu, Kanta Kumar, Thomas W. Rambosek, Tzu Li Joseph Huang
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Patent number: 6132861Abstract: A retroreflective article comprising a substrate and a cured ceramer coating provided on at least a portion of a surface of the substrate. The coated portion of the surface is retroreflective. The coating comprises a cured ceramer composite derived from ingredients comprising a free radically curable binder precursor and a plurality of surface treated, colloidal inorganic oxide components. The colloidal inorganic oxide components are surface treated with a surface treatment agent comprising a fluoro/silane component comprising a hydrolyzable silane moiety and a fluorinated moiety, and a crosslinkable silane component comprising a hydrolyzable silane moiety and a free radically crosslinkable moiety. The weight ratio of the crosslinkable silane component to the fluoro/silane component is from about 4:1 to 20:1, and the weight ratio of the free radically curable binder precursor to the colloidal inorganic oxide components is from about 1:10 to 8:10.Type: GrantFiled: May 4, 1998Date of Patent: October 17, 2000Assignee: 3M Innovatives Properties CompanyInventors: Soonkun Kang, John L. Ethen, Gregory E. Gilligan, Christopher J. Gustafson, Tzu Li Joseph Huang, Sithya Seda Khieu, Kanta Kumar, Thomas W. Rambosek
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Patent number: 5725882Abstract: Cosmetic compositions are provided containing vinyl-silicone graft or block copolymers of the formula ##STR1##Type: GrantFiled: June 5, 1995Date of Patent: March 10, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kanta Kumar, Ramesh C. Kumar, Smarajit Mitra
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Patent number: 5626859Abstract: The present disclosure describes an solid ectoparasite control composition for topical application to the hair coat or fur of a domesticated animal or household pet, such as a dog or cat, to control ectoparasites. The disclosure also describes an applicator package for applying an ectoparasite control composition that is in the form of a molded stick, by rubbing or spreading it on the hair coat of the animal. Methods of making and applying solid ectoparasite control compositions are also described in the present disclosure.Type: GrantFiled: May 10, 1995Date of Patent: May 6, 1997Inventors: Joanne A. Fitch, Kanta Kumar, Duane M. Pinault
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Patent number: 5597557Abstract: A process for making solid colored particles by preparing a reaction solution in water comprising formaldehyde, urea, a cyclic polyamine functional triazine compound, and acid. A dye can be incorporated into the reaction solution if a color other than white is desired. Particles are formed having an average particle size between 1 and 70 microns without the need to resort to crushing to break up agglomerates. Particles made by this process provide excellent color and are easily washable from a substrate when incorporated into a washable formulation.Additionally, it has been found that the incorporation of colored microcapsules of average size of 1-70 microns where the color is located primarily on or in the shell of the microcapsule also provides excellent washable compositions when incorporated into a washable formulation.Type: GrantFiled: May 1, 1995Date of Patent: January 28, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kanta Kumar, Robert A. Davis, Sheila M. Nichols, Howard J. Buttery