Patents by Inventor Ashish Shah

Ashish Shah 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).

  • Publication number: 20030090857
    Abstract: The present invention is directed to a water based electrolyte used in a hybrid-type capacitor. The hybrid-type capacitor has an electrolytic anode and an electrochemical cathode. The difference resides in the electrolyte for this type of capacitor. The electrolyte has water, a water soluble inorganic and/or organic acid and/or salt, and a water soluble nitro-aromatic compound. Such a hybrid capacitor (1) improves energy density by significantly reducing volume of the separator and cathod material often used in conventional electrolytic capacitors and (2) has an electrochemical cathode that undergoes an electrochemical reduction without generating gassing. For example, ruthenium oxide, RuO2, is reduced to ruthenium hydroxide, Ru(OH)2, when passing a cathodic current. However, the present invention discovered that without the present electrolyte, the RuO2 cathode does generate gassing if it is sufficiently depleted.
    Type: Application
    Filed: November 14, 2002
    Publication date: May 15, 2003
    Inventors: Yanming Liu, Ashish Shah, Barry Muffoletto
  • Publication number: 20030070920
    Abstract: A deposition process for coating a substrate with a ruthenium-containing oxide material, or a precursor thereof, is described. Preferably, the reagent solution is substantially devoid of a halide, such as chlorine. The coated substrate is useful as an electrode in a capacitor.
    Type: Application
    Filed: October 22, 2002
    Publication date: April 17, 2003
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Publication number: 20030068509
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray is described. The resultant droplets are much smaller in size than those produced by conventional processes, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance. A preferred coating is of a ruthenium-containing oxide.
    Type: Application
    Filed: November 8, 2002
    Publication date: April 10, 2003
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Publication number: 20030061220
    Abstract: A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 27, 2003
    Inventors: Rahim Ibrahim, Tuan Nguyen, Ashish Shah, Ranjit Ghate, Chan Ng, Gen-Hwa Chiang
  • Patent number: 6468605
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray of a pseudocapacitive material, or a precursor thereof, contacted to a substrate heated to a temperature to instantaneously solidify the pseudocapacitive material or convert the precursor to a solidified pseudocapacitive metal compound, is described. The ultrasonic aerosol droplets are much smaller in size than those produced by conventional processes and the heated substrate minimizes the possibility of contamination, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: October 22, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Patent number: 6455108
    Abstract: A pseudocapacitive material contacted to a substrate by a thermal spraying process, is described. Suitable thermal spraying processes include chemical combustion spraying and electrical heating spraying, using both wire and powder processes. The thusly coated substrate is useful as an electrode in an electrical energy storage device such as a capacitor, an electrochemical cell and the like.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: September 24, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Ashish Shah, Neal N. Nesselbeck
  • Publication number: 20020044405
    Abstract: An electrode component for an electrochemical cell or a capacitor is described wherein the electrode is produced by physical vapor depositing an electrode active material onto a substrate to coat the substrate. The thusly produced electrode is useful as a cathode in a primary electrochemical cell and as a cathode and an anode in a secondary cell, and as an electrode in an electrochemical capacitor and an electrolytic capacitor.
    Type: Application
    Filed: December 10, 2001
    Publication date: April 18, 2002
    Inventors: Barry C. Muffoletto, Ashish Shah, Neal N. Nesselbeck
  • Publication number: 20020041997
    Abstract: An electrode component for an electrochemical cell or a capacitor is described wherein the electrode is produced by physical vapor depositing an electrode active material onto a substrate to coat the substrate. The thusly produced electrode is useful as a cathode in a primary electrochemical cell and as a cathode and an anode in a secondary cell, and as an electrode in an electrochemical capacitor and an electrolytic capacitor.
    Type: Application
    Filed: December 12, 2001
    Publication date: April 11, 2002
    Inventors: Barry C. Muffoletto, Ashish Shah, Neal N. Nesselbeck
  • Patent number: 6334879
    Abstract: A sealed capacitor, which may be hermetic, having a generally flat, planar geometry, is described. The capacitor includes at least one electrode provided by a metallic substrate having a capacitive material contacted thereto. The coated substrate can provide at least one of the casing side walls itself or, be connected to the side wall. A most preferred form of the capacitor has the conductive substrate provided with the capacitive material formed from an ultrasonically generated aerosol.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: January 1, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Rodney E. Stringham, Neal N. Nesselbeck, Ashish Shah, Donald H. Stephenson
  • Patent number: 6332900
    Abstract: An electrode component for an electrochemical cell or a capacitor is described wherein the electrode is produced by physical vapor depositing an electrode active material onto a substrate to coat the substrate. The thusly produced electrode is useful as a cathode in a primary electrochemical cell and as a cathode and an anode in a secondary cell, and as an electrode in an electrochemical capacitor and an electrolytic capacitor.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: December 25, 2001
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Ashish Shah, Neal Nesselbeck
  • Publication number: 20010051231
    Abstract: A method for improving the electrical conductivity of a substrate of metal, metal alloy or metal oxide comprising depositing a small or minor amount of metal or metals from Group VIIIA metals (Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt) or from Group IA metals (Cu, Ag, Au) on a substrate of metal, metal alloys and/or metal oxide from Group IVA metals (Ti, Zr, Hf), Group VA metals (V, Nb, Ta), Group VIA metals (Cr, Mo, W) and Al, Mn, Ni and Cu and then directing a high energy beam onto the substrate to cause an intermixing of the deposited material with the native oxide of the substrate metal or metal alloy. The native oxide layer is changed from electrically insulating to electrically conductive. The step of depositing can be carried out, for example, by ion beam assisted deposition, electron beam deposition, chemical vapor deposition, physical vapor deposition, plasma assisted, low pressure plasma and plasma spray deposition and the like.
    Type: Application
    Filed: May 1, 1997
    Publication date: December 13, 2001
    Inventors: BARRY C. MUFFOLETTO, ASHISH SHAH, DONALD H. STEPHENSON
  • Publication number: 20010026850
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray of a pseudocapacitive material, or a precursor thereof, contacted to a substrate heated to a temperature to instantaneously solidify the pseudocapacitive material or convert the precursor to a solidified pseudocapacitive metal compound, is described. The ultrasonic aerosol droplets are much smaller in size than those produced by conventional processes and the heated substrate minimizes the possibility of contamination, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Application
    Filed: May 1, 2001
    Publication date: October 4, 2001
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Publication number: 20010021411
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray of a pseudocapacitive material, or a precursor thereof, contacted to a substrate heated to a temperature to instantaneously solidify the pseudocapacitive material or convert the precursor to a solidified pseudocapacitive metal compound, is described. The ultrasonic aerosol droplets are much smaller in size than those produced by conventional processes and the heated substrate minimizes the possibility of contamination, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Application
    Filed: March 14, 2001
    Publication date: September 13, 2001
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Patent number: 6224985
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray of a pseudocapacitive material, or a precursor thereof, contacted to a substrate heated to a temperature to instantaneously solidify the pseudocapacitive material or convert the precursor to a solidified pseudocapacitive metal compound, is described. The ultrasonic aerosol droplets are much smaller in size than those produced by conventional processes and the heated substrate minimizes the possibility of contamination, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: May 1, 2001
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Patent number: 6219222
    Abstract: An electrolyte for activating an electrolytic or electrochemical capacitor is described. The electrolyte preferably includes a mixed solvent of water and ethylene glycol having an ammonium salt dissolved therein. An acid such as phosphoric or acetic acid is used to provide a pH of about 3 to 6. The electrolyte is particularly useful for activating a ruthenium oxide/tantalum capacitor having an anode breakdown voltage in the range of 175 to 300 volts.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: April 17, 2001
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Ashish Shah, Christina Scheuer, Lauren Miller, Barry C. Muffoletto
  • Patent number: 6096391
    Abstract: A method for improving the electrical conductivity of a substrate of metal, metal alloy or metal oxide comprising depositing a small or minor amount of metal or metals from Group VIIIA metals (Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt) or from Group IA metals (Cu, Ag, Au) on a substrate of metal, metal alloys and/or metal oxide from Group IVA metals (Ti, Zr, Hf), Group VA metals (V, Nb, Ta), Group VIA metals (Cr, Mo, W) and Al, Mn, Ni and Cu. The native oxide layer of the substrate is changed from electrically insulating to electrically conductive. The step of depositing is carried out by a low temperature arc vapor deposition process. The deposition may be performed on either treated or untreated substrate. The substrate with native oxide layer made electrically conductive is useable in the manufacture of electrodes for devices such as capacitors and batteries.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: August 1, 2000
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Ashish Shah
  • Patent number: 5926362
    Abstract: A sealed capacitor, which may be hermetic, having a generally flat, planar geometry, is described The capacitor includes at least one electrode provided by a metallic substrate having a capacitive material contacted thereto. The coated substrate can provide at least one of the casing side walls itself or, be connected to the side wall. A most preferred form of the capacitor has the conductive substrate provided with the capacitive material formed from an ultrasonically generated aerosol.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: July 20, 1999
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Rodney E. Stringham, Neal N. Nesselbeck, Ashish Shah, Donald H. Stephenson
  • Patent number: 5920455
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray of a pseudocapacitive material or a precursor thereof contacted to a substrate heated to a temperature to instantaneously solidify the pseudocapacitive material or convert the precursor to a solidified pseudocapacitive metal compound, is described. The ultrasonic aerosol droplets are much smaller in size than those produced by conventional processes and the heated substrate minimizes the possibility of contamination, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: July 6, 1999
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Ashish Shah, Barry C. Muffoletto
  • Patent number: 5894403
    Abstract: A deposition process for coating a substrate with an ultrasonically generated aerosol spray, is described. The resultant droplets are much smaller in size than those produced by conventional processes, thereby providing the present coating having an increased surface area. When the coated substrate is an electrode in a capacitor, a greater surface area results in an increased electrode capacitance.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: April 13, 1999
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Ashish Shah, Barry C. Muffoletto, Neal N. Nesselbeck
  • Patent number: 4463429
    Abstract: A computer controlled apparatus for grain elevators which includes a computer with keyboard and display and suitable output devices such as a printer and which receives inputs from sensing devices such as scales and moisture analyzers and sensors and which records and retains grain transactions as the grain is weighed and unloaded and in which samples of the grain are selected and analyzed in a moisture meter. The elevator operator inputs with the keyboard particular customer numbers and other desired information and the apparatus eliminates weigh ticket writing and prints over the scale transactions automatically and provides instant decision data such as marketing data so that the accounting functions can be automatically selected.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: July 31, 1984
    Assignee: Industrial Design Engineering Associates, Ltd.
    Inventors: Donald P. DeVale, Howard B. Wilbrandt, Dennis E. Tomlinson, Ashish Shah