Patents by Inventor David Masheder
David Masheder 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).
-
Patent number: 9129747Abstract: A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, an electrolyte, and a cathode containing a metal substrate on which is disposed a conductive coating is provided. Prior to application of the conductive coating, the metal substrate is blasted with abrasive particles to enhance the ability of the substrate to adhere to the coating. The micro-roughened metal substrate can be treated after blasting so that substantially all of the abrasive particles are removed. This is accomplished by contacting the metal substrate with an extraction solution to remove the particles, and also by selectively controlling the nature of the abrasive particles so that they are dispersible (e.g., soluble) in the solution.Type: GrantFiled: March 5, 2013Date of Patent: September 8, 2015Assignee: AVX CorporationInventors: Ian Pinwill, David Masheder
-
Patent number: 9076592Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a microemulsion on the surface of the metal substrate. The microemulsion is a thermodynamically stable, isotropic liquid mixture that contains a precursor monomer, sulfonic acid, nonionic surfactant, and solvent.Type: GrantFiled: March 4, 2013Date of Patent: July 7, 2015Assignee: AVX CorporationInventors: David Masheder, Mitchell D. Weaver
-
Patent number: 9053861Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a precursor colloidal suspension on the surface of the substrate. The colloidal suspension includes a precursor monomer, ionic surfactant, and sulfonic acid, which when employed in combination can synergistically improve the degree of surface coverage and overall conductivity of the coating.Type: GrantFiled: March 4, 2013Date of Patent: June 9, 2015Assignee: AVX CorporationInventors: Mitchell D. Weaver, Dirk H. Dreissig, Jan Petrzilek, Martin Biler, David Masheder, Ian Pinwill
-
Patent number: 8747489Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The powder may have a high specific charge and in turn a relative dense packing configuration. Despite being formed from such a powder, a manganese precursor solution can be readily impregnated into the pores of the anode. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner.Type: GrantFiled: August 14, 2013Date of Patent: June 10, 2014Assignee: AVX CorporationInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Patent number: 8619410Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The present inventors have discovered a technique that is believed to substantially improve the uniformity and consistency of the manganese oxide layer. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner. This improves the quality of the resulting oxide as well as its surface coverage, and thereby enhances the electrical performance of the capacitor.Type: GrantFiled: May 31, 2011Date of Patent: December 31, 2013Assignee: AVX CorporationInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Publication number: 20130335886Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The powder may have a high specific charge and in turn a relative dense packing configuration. Despite being formed from such a powder, a manganese precursor solution can be readily impregnated into the pores of the anode. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner.Type: ApplicationFiled: August 14, 2013Publication date: December 19, 2013Applicant: AVX CorporationInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Publication number: 20130242468Abstract: A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, an electrolyte, and a cathode containing a metal substrate on which is disposed a conductive coating is provided. Prior to application of the conductive coating, the metal substrate is blasted with abrasive particles to enhance the ability of the substrate to adhere to the coating. The micro-roughened metal substrate can be treated after blasting so that substantially all of the abrasive particles are removed. This is accomplished by contacting the metal substrate with an extraction solution to remove the particles, and also by selectively controlling the nature of the abrasive particles so that they are dispersible (e.g., soluble) in the solution.Type: ApplicationFiled: March 5, 2013Publication date: September 19, 2013Applicant: AVX CORPORATIONInventors: Ian Pinwill, David Masheder
-
Publication number: 20130242465Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a precursor colloidal suspension on the surface of the substrate. The colloidal suspension includes a precursor monomer, ionic surfactant, and sulfonic acid, which when employed in combination can synergistically improve the degree of surface coverage and overall conductivity of the coating.Type: ApplicationFiled: March 4, 2013Publication date: September 19, 2013Applicant: AVX CorporationInventors: Mitchell D. Weaver, Dirk H. Dreissig, Jan Petrzilek, Martin Biler, David Masheder, Ian Pinwill
-
Publication number: 20130242466Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a microemulsion on the surface of the metal substrate. The microemulsion is a thermodynamically stable, isotropic liquid mixture that contains a precursor monomer, sulfonic acid, nonionic surfactant, and solvent.Type: ApplicationFiled: March 4, 2013Publication date: September 19, 2013Applicant: AVX CORPORATIONInventors: David Masheder, Mitchell D. Weaver
-
Patent number: 8512422Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The powder has a high specific charge and in turn a relative dense packing configuration. Despite being formed from such a powder, the present inventors have discovered that a manganese precursor solution (e.g., manganese nitrate) can be readily impregnated into the pores of the anode. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner.Type: GrantFiled: May 31, 2011Date of Patent: August 20, 2013Assignee: AVX CorporationInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Publication number: 20110317335Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The powder has a high specific charge and in turn a relative dense packing configuration. Despite being formed from such a powder, the present inventors have discovered that a manganese precursor solution (e.g., manganese nitrate) can be readily impregnated into the pores of the anode. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner.Type: ApplicationFiled: May 31, 2011Publication date: December 29, 2011Applicant: AVX CORPORATIONInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Publication number: 20110317334Abstract: A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The present inventors have discovered a technique that is believed to substantially improve the uniformity and consistency of the manganese oxide layer. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner. This improves the quality of the resulting oxide as well as its surface coverage, and thereby enhances the electrical performance of the capacitor.Type: ApplicationFiled: May 31, 2011Publication date: December 29, 2011Applicant: AVX CORPORATIONInventors: Ian Pinwill, David Masheder, Silvie Vilcova, Petr Stojan, Jiri Hurt, Ivan Horacek
-
Patent number: 6197252Abstract: The invention relates to a method of removing water-insoluble binder from a porous article formed from pressed particulate material, such as tantalum powder. The invention provides a method capable of removing substantially all of the binder from the article for high purity applications, such as capacitor manufacture. The method comprises contacting the article with an aqueous solution of an agent which reacts with said binder to produce a water soluble derivative thereof whereby said binder derivative may be substantially dissolved in said solution. In a particular embodiment, the derivative is produced by hydrolysis of a fatty acid binder.Type: GrantFiled: July 12, 1999Date of Patent: March 6, 2001Assignee: AVX LimitedInventors: Ian H. Bishop, David Masheder
-
Patent number: 5435927Abstract: A lubricating oil composition for use in an internal combustion engine comprising (1) a lubricating base oil, and (2) a monofunctional perfluoropolyether derivative of the general formula R.sub.F -Z where R.sub.F is a perfluoropolyether moiety with an average molecular weight in the range of from 135 to 20,000, and Z is a functional group.Type: GrantFiled: December 2, 1993Date of Patent: July 25, 1995Assignee: The British Petroleum Company p.l.c.Inventors: Paul Beckwith, Ian C. Callaghan, David Masheder
-
Patent number: 5274180Abstract: Esters of hydroxy terminated monofunctional polyalkylene oxide derivatives and monofunctional perfluoropolyether carboxylic acids are novel compounds. They may be used to form emulsions and to modify droplet size in atomization.Type: GrantFiled: October 22, 1992Date of Patent: December 28, 1993Assignee: British Petroleum Company plcInventor: David Masheder