Patents by Inventor Ajaykumar Bunha

Ajaykumar Bunha 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).

  • Process for Forming an Electrolytic Capacitor Having a Higher Cap Recovery and Lower ESR
    Publication number: 20200152393
    Abstract: Provided is an improved capacitor formed by a process comprising: providing an anode comprising a dielectric thereon wherein the anode comprises a sintered powder wherein the powder has a powder charge of at least 45,000 ?FV/g; and forming a first conductive polymer layer encasing at least a portion of the dielectric by applying a first slurry wherein the first slurry comprises a polyanion and a conductive polymer and wherein the polyanion and conductive polymer are in a weight ratio of greater than 3 wherein the conductive polymer and polyanion forms conductive particles with an average particle size of no more than 20 nm.
    Type: Application
    Filed: January 13, 2020
    Publication date: May 14, 2020
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen, Elisabeth Crittendon Key
  • Conductive polymer dispersion for improved reliability
    Patent number: 10650980
    Abstract: A capacitor and process for forming the capacitor, is provided wherein the capacitor comprises a conductive polymer layer. The conductive polymer comprises first particles comprising conductive polymer and polyanion and second particles comprising the conductive polymer and said polyanion wherein the first particles have an average particle diameter of at least 1 micron to no more than 10 microns and the second particles have an average particle diameter of at least 1 nm to no more than 600 nm.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: May 12, 2020
    Assignee: KEMET Electronics Corporation
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Qingping Chen, Yaru Shi, Philip M. Lessner
  • Conductive Polymer Dispersion for Improved Reliability
    Publication number: 20190311857
    Abstract: An improved capacitor is provided wherein the capacitor comprises a conductive polymer layer. The conductive polymer comprises first particles comprising conductive polymer and polyanion and second particles comprising the conductive polymer and said polyanion wherein the first particles have an average particle diameter of at least 1 micron to no more than 10 microns and the second particles have an average particle diameter of at least 1 nm to no more than 600 nm.
    Type: Application
    Filed: June 10, 2019
    Publication date: October 10, 2019
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Yaru Shi, Qingping Chen, Philip M. Lessner
  • Polyanion Copolymers for Use with Conducting Polymers in Solid Electrolytic Capacitors
    Publication number: 20190267194
    Abstract: A capacitor and a method of making a capacitor, is provided with improved reliability performance. The capacitor comprises an anode; a dielectric on the anode; and a cathode on the dielectric wherein the cathode comprises a conductive polymer and a polyanion wherein the polyanion is a copolymer comprising groups A, B and C represented by Formula AxByCz as described herein.
    Type: Application
    Filed: May 14, 2019
    Publication date: August 29, 2019
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Yaru Shi, Qingping Chen, Philip M. Lessner
  • Polyanion copolymers for use with conducting polymers in solid electrolytic capacitors
    Patent number: 10340091
    Abstract: A capacitor and a method of making a capacitor, is provided with improved reliability performance. The capacitor comprises an anode; a dielectric on the anode; and a cathode on the dielectric wherein the cathode comprises a conductive polymer and a polyanion wherein the polyanion is a copolymer comprising groups A, B and C represented by Formula AxByCz as described herein.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: July 2, 2019
    Assignee: KEMET Electronics Corporation
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Yaru Shi, Qingping Chen, Philip M. Lessner
  • Conductive Polymer Dispersion for Improved Reliability
    Publication number: 20190115158
    Abstract: A capacitor and process for forming the capacitor, is provided wherein the capacitor comprises a conductive polymer layer. The conductive polymer comprises first particles comprising conductive polymer and polyanion and second particles comprising the conductive polymer and said polyanion wherein the first particles have an average particle diameter of at least 1 micron to no more than 10 microns and the second particles have an average particle diameter of at least 1 nm to no more than 600 nm.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 18, 2019
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Qinping Chen, Yaru Shi, Philip M. Lessner
  • Conductive Polymer Dispersion for Improved Reliability
    Publication number: 20190115159
    Abstract: An improved capacitor is provided wherein the capacitor comprises a conductive polymer layer. The conductive polymer comprises first particles comprising conductive polymer and polyanion and second particles comprising the conductive polymer and said polyanion wherein the first particles have an average particle diameter of at least 1 micron to no more than 10 microns and the second particles have an average particle diameter of at least 1 nm to no more than 600 nm.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 18, 2019
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Qingping Chen, Yaru Shi, Philip M. Lessner
  • Process for Forming an Electrolytic Capacitor Having a Higher Cap Recovery and Lower ESR
    Publication number: 20180330888
    Abstract: Provided is an improved capacitor formed by a process comprising: providing an anode comprising a dielectric thereon wherein the anode comprises a sintered powder wherein the powder has a powder charge of at least 45,000 ?FV/g; and forming a first conductive polymer layer encasing at least a portion of the dielectric by applying a first slurry wherein the first slurry comprises a polyanion and a conductive polymer and wherein the polyanion and conductive polymer are in a weight ratio of greater than 3 wherein the conductive polymer and polyanion forms conductive particles with an average particle size of no more than 20 nm.
    Type: Application
    Filed: July 26, 2018
    Publication date: November 15, 2018
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen
  • Polyanion Copolymers for Use with Conducting Polymers in Solid Electrolytic Capacitors
    Publication number: 20170338047
    Abstract: A capacitor and a method of making a capacitor, is provided with improved reliability performance. The capacitor comprises an anode; a dielectric on the anode; and a cathode on the dielectric wherein the cathode comprises a conductive polymer and a polyanion wherein the polyanion is a copolymer comprising groups A, B and C represented by Formula AxByCz as described herein.
    Type: Application
    Filed: May 15, 2017
    Publication date: November 23, 2017
    Inventors: Ajaykumar Bunha, Antony P. Chacko, Yaru Shi, Qingping Chen, Philip M. Lessner