Patents by Inventor Elisabeth Crittendon Key

Elisabeth Crittendon Key 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: 11676770
    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: Grant
    Filed: June 24, 2021
    Date of Patent: June 13, 2023
    Assignee: KEMET Electronics Corporation
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen, Elisabeth Crittendon Key
  • Patent number: 11393637
    Abstract: Provided is an improved capacitor and a method of making an improved capacitor. The capacitor comprises a hermetically sealed casing with a capacitive element in the hermetically sealed casing. The capacitive element comprises a cathode with an ionic liquid in the cathode.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: July 19, 2022
    Assignee: KEMET Electronics Corporation
    Inventors: Antony P. Chacko, Elisabeth Crittendon Key, Philip M. Lessner
  • Publication number: 20220148816
    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: June 24, 2021
    Publication date: May 12, 2022
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen, Elisabeth Crittendon Key
  • Patent number: 11081290
    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: Grant
    Filed: January 13, 2020
    Date of Patent: August 3, 2021
    Assignee: KEMET Electronics Corporation
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen, Elisabeth Crittendon Key
  • Patent number: 10879010
    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: Grant
    Filed: July 26, 2018
    Date of Patent: December 29, 2020
    Assignee: KEMET Electronics Corporation
    Inventors: Yaru Shi, Antony P. Chacko, Ajaykumar Bunha, Qingping Chen, Elisabeth Crittendon Key
  • Publication number: 20200388441
    Abstract: Provided is an improved capacitor and a method of making an improved capacitor. The capacitor comprises a hermetically sealed casing with a capacitive element in the hermetically sealed casing. The capacitive element comprises a cathode with an ionic liquid in the cathode.
    Type: Application
    Filed: June 3, 2019
    Publication date: December 10, 2020
    Inventors: Antony P. Chacko, Elisabeth Crittendon Key, Philip M. Lessner
  • 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
  • Patent number: 6804109
    Abstract: A solid electrical capacitor having lowered ESR and fewer short circuit from processing is obtained by adhering a number of islands of a material more basic than the dielectric coating on an anode before forming a conductive polymer on the dielectric coating by a chemical oxidation process.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: October 12, 2004
    Assignee: Kemet Electronics Corporation
    Inventors: Randolph S. Hahn, Brian J. Melody, John T. Kinard, Kimberly L. Pritchard, Elisabeth Crittendon Key