Patents by Inventor Nanayakkara L. D. Somasiri
Nanayakkara L. D. Somasiri 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: 10121570Abstract: An enhanced breakdown strength dielectric material includes a base dielectric layer having first and second opposing major surfaces. A first stress mitigating layer is disposed on the first major surface of the base dielectric layer. A second stress mitigating layer disposed on the second major surface of the base dielectric layer. A volume conductivity of at least one of the first and second stress mitigating layers is at least 2 times a volume conductivity of the base dielectric layer.Type: GrantFiled: October 14, 2015Date of Patent: November 6, 2018Assignee: 3M Innovative Properties CompanyInventors: Nanayakkara L. D. Somasiri, Paul V. Huynh, Andrew C. Lottes, William L. Taylor, Levent Biyikli, Carl E. Fisher
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Publication number: 20170250008Abstract: An enhanced breakdown strength dielectric material comprises a base dielectric layer having first and second opposing major surfaces. A first stress mitigating layer is disposed on the first major surface of the base dielectric layer. A second stress mitigating layer disposed on the second major surface of the base dielectric layer. A volume conductivity of at least one of the first and second stress mitigating layers is at least 2 times a volume conductivity of the base dielectric layer.Type: ApplicationFiled: October 14, 2015Publication date: August 31, 2017Inventors: Nanayakkara L.D. SOMASIRI, Paul V. HUYNH, Andrew C. LOTTES, William L. TAYLOR, Levent BIYIKLI, Carl E. FISHER
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Patent number: 9390833Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: GrantFiled: December 23, 2014Date of Patent: July 12, 2016Assignee: 3M Innovative Properties CompanyInventors: Andrew C. Lottes, Nanayakkara L. D. Somasiri, Jimmie R. Baran, Jr., Paul V. Huynh
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Patent number: 9349498Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: GrantFiled: December 23, 2014Date of Patent: May 24, 2016Assignee: 3M Innovative Properties CompanyInventors: Andrew C. Lottes, Nanayakkara L. D. Somasiri, Jimmie R. Baran, Jr., Badri Veeraraghavan, Paul V. Huynh, Dipankar Ghosh
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Publication number: 20150137047Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: ApplicationFiled: December 23, 2014Publication date: May 21, 2015Inventors: Andrew C. Lottes, Nanayakkara L.D. Somasiri, Jimmie R. Baran, JR., Badri Veeraraghavan, Paul V. Huynh, Dipankar Ghosh
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Publication number: 20150108414Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: ApplicationFiled: December 23, 2014Publication date: April 23, 2015Inventors: Andrew C. Lottes, Nanayakkara L.D. Somasiri, Jimmie R. Baran, JR., Paul V. Huynh
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Patent number: 8974706Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: GrantFiled: December 7, 2010Date of Patent: March 10, 2015Assignee: 3M Innovative Properties CompanyInventors: Nanayakkara L. D. Somasiri, Jimmie R. Baran, Jr., Andrew C. Lottes, Ge Jiang, Badri Veeraraghavan, Paul V. Huynh, Dipankar Ghosh
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Patent number: 8435427Abstract: Provided are compositions and materials that have varistor properties and are suitable for use in electrical stress control devices and surge arrestor devices. The compositions and materials include a polymeric material and calcined calcium copper titanate filler material and have a reversible non-linear current-voltage characteristic.Type: GrantFiled: August 26, 2010Date of Patent: May 7, 2013Assignee: 3M Innovative Properties CompanyInventors: Dipankar Ghosh, Kenton D. Budd, Nanayakkara L. D. Somasiri, Ge Jiang, Bradley L. Givot
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Publication number: 20120049135Abstract: Provided are compositions and materials that have varistor properties and are suitable for use in electrical stress control devices and surge arrestor devices. The compositions and materials include a polymeric material and calcined calcium copper titanate filler material and have a reversible non-linear current-voltage characteristic.Type: ApplicationFiled: August 26, 2010Publication date: March 1, 2012Inventors: Dipankar Ghosh, Kenton D. Budd, Nanayakkara L.D. Somasiri, Ge Jiang, Bradley L. Givot
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Publication number: 20110140052Abstract: Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Inventors: Nanayakkara L.D. Somasiri, Jimmie R. Baran, JR., Andrew C. Lottes, Ge Jiang, Badri Veeraraghavan, Paul V. Huynh, Dipankar Ghosh
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Publication number: 20030211425Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: ApplicationFiled: March 18, 2003Publication date: November 13, 2003Applicant: 3M Innovative Properties CompanyInventors: Guoping Mao, Hany B. Eitouni, Alphonsus V. Pocius, John B. Scheibner, Nanayakkara L.D. Somasiri, Nicholas A. Stacey, Alfred Viehbeck
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Patent number: 6559245Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: GrantFiled: January 3, 2002Date of Patent: May 6, 2003Assignee: 3M Innovative Properties CompanyInventors: Guoping Mao, Nanayakkara L. D. Somasiri, Nicholas A. Stacey
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Publication number: 20020086236Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: ApplicationFiled: January 3, 2002Publication date: July 4, 2002Applicant: 3M Innovative Properties CompanyInventors: Hany B. Eitouni, Alphonsus V. Pocius, John B. Scheibner, Nanayakkara L.D. Somasiri, Nicholas A. Stacey, Alfred Viehbeck
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Patent number: 6379865Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: GrantFiled: April 11, 2000Date of Patent: April 30, 2002Assignee: 3M Innovative Properties CompanyInventors: Guoping Mao, Hany B. Eitouni, Alphonsus V. Pocius, John B. Scheibner, Nanayakkara L. D. Somasiri, Nicholas A. Stacey, Alfred Viehbeck
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Patent number: 5609969Abstract: The invention comprises a self supporting electronic packaging article comprising an insulative polymer overcoated with an antistatic/protective coating system comprising from about 8 mg/m.sup.2 to about 70 mg/m.sup.2 vanadium pentoxide, from about 36 mg/m.sup.2 to about 270 mg/m.sup.2 of a polymer latex having a hydrophilic functionality, and from about 210 mg/m.sup.2 to about 842 mg/m.sup.2 of a nonsulfonated protective topical binder, all of which may be contained in a single coating, or which may be contained in a two-layer coating system.Type: GrantFiled: June 30, 1995Date of Patent: March 11, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: William J. Clatanoff, Eric D. Morrison, Nanayakkara L. D. Somasiri
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Patent number: 5023149Abstract: Electrochemical cells including secondary batteries and fuel cells are provided employing polyanilines having improved reversibility, stability and electrochemical properties. In accordance with a preferred embodiment polyaniline is employed as a cathode active polymer in a secondary battery at a pH between about 1 and 11. In accordance with nother embodiments, fuel cells employing polyaniline are provided as are batteries wherein polyanilines are used as anodes.Type: GrantFiled: June 3, 1988Date of Patent: June 11, 1991Assignee: University Patents, Inc.Inventors: Alan G. MacDiarmid, Nanayakkara L. D. Somasiri
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Patent number: 4975327Abstract: The adhesion of metal to a polyimide substrate is enhanced by depositing onto at least one surface of the polyimide a thin film of metal such as copper and heating in air to cause the deposited metal to texturize that surface by producing asperities that are at least 0.05 .mu.m in average height and average breadth. In doing so, metal oxide clusters are formed at the textured surface. When the textured surface is metallized, the resulting composite resists delamination even at soldering temperatures.Type: GrantFiled: July 11, 1989Date of Patent: December 4, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Nanayakkara L. D. Somasiri, Thomas A. Speckhard
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Patent number: 4820595Abstract: Electrochemical cells including secondary batteries and fuel cells are provided employing polyanilines having improved reversibility, stability and electrochemical properties. In accordance with a preferred embodiment polyaniline is employed as a cathode active polymer in a secondary battery at a pH between about 1 and 11. In accordance with other embodiment, fuel cells employing polyaniline are provided as are batteries wherein polyanilines are used as anodes.Type: GrantFiled: September 12, 1986Date of Patent: April 11, 1989Assignee: University Patents, Inc.Inventors: Alan G. MacDiarmid, Nanayakkara L. D. Somasiri