Patents by Inventor C. Joseph Farahmandi
C. Joseph Farahmandi 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: 7407520Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: GrantFiled: August 10, 2006Date of Patent: August 5, 2008Assignee: Maxwell Technologies, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Patent number: 7116545Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: GrantFiled: March 9, 2005Date of Patent: October 3, 2006Assignee: Maxwell Technologies, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Patent number: 7090706Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: GrantFiled: March 31, 2004Date of Patent: August 15, 2006Assignee: Maxwell Technologies, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Patent number: 6842330Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: GrantFiled: September 6, 2002Date of Patent: January 11, 2005Assignee: Maxwell Technologies, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Publication number: 20040252443Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: ApplicationFiled: March 31, 2004Publication date: December 16, 2004Applicant: Maxwell Electronic Components Group, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Patent number: 6804108Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.Type: GrantFiled: July 28, 2003Date of Patent: October 12, 2004Assignee: Maxwell Electronics, Inc.Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
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Publication number: 20040085709Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.Type: ApplicationFiled: July 28, 2003Publication date: May 6, 2004Applicant: Maxwell Electronics, Inc.Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
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Patent number: 6627252Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.Type: GrantFiled: May 12, 2000Date of Patent: September 30, 2003Assignee: Maxwell Electronic Components, Inc.Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
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Patent number: 6585152Abstract: A method of making a double layer capacitor consists of the steps of: impregnating each of a plurality of carbon preforms with a metal; forming a plurality of current collector foils, each of the plurality of current collector foils having a tab portion and a paddle portion; forming a plurality of electrodes by positioning one of the plurality of carbon preforms against respective paddle portions of each of the plurality of current collector foils, wherein each of the plurality of electrodes comprises one of the plurality of current collector foils and one of the plurality of carbon preforms; stacking each of the plurality of electrodes such that tab portions of adjacent ones of the plurality of current collector foils are offset, thereby forming an electrode stack; interposing respective porous separator portions between each of the plurality of electrodes, wherein the porous separator portions function as electrical insulators between the adjacent ones of the plurality of electrodes preventing electrical shType: GrantFiled: February 13, 2001Date of Patent: July 1, 2003Assignee: Maxwell Technologies, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford
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Publication number: 20030030969Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal.Type: ApplicationFiled: September 6, 2002Publication date: February 13, 2003Applicant: Maxwell Electronic Components Group, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Patent number: 6451073Abstract: A single cell, multi-electrode high performance double layer capacitor includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of one stack being interleaved with the electrodes of the other stack to form an interleaved stack, and with the electrodes of each stack being electrically connected to respective capacitor terminals. A porous separator is positioned against the electrodes of one stack before interleaving to prevent electrical shorts between the electrodes. The electrodes are made by folding a compressible, low resistance, aluminum-impregnated carbon cloth, made from activated carbon fibers, around a current collector foil, with a tab of the foils of each electrode of each stack being connected in parallel and connected to the respective capacitor terminal.Type: GrantFiled: May 16, 2000Date of Patent: September 17, 2002Assignee: Maxwell Electronic Components Group, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Alan C. Kolb
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Patent number: 6449139Abstract: A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first metal impregnated carbon cloth electrode having a metal impregnated side which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first metal impregnated carbon cloth electrode and separating the first metal impregnated carbon cloth electrode from a second metal impregnated carbon cloth electrode having a metal impregnated side which faces away from the porous separator. A second current collector foil is juxtaposed against the metal impregnated side of the second metal impregnated carbon cloth electrode and is electrically coupled to the second terminal.Type: GrantFiled: August 18, 1999Date of Patent: September 10, 2002Assignee: Maxwell Electronic Components Group, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford, Chenniah Nanjundiah
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Publication number: 20010020319Abstract: A method of making a double layer capacitor consists of the steps of: impregnating each of a plurality of carbon preforms with a metal; forming a plurality of current collector foils, each of the plurality of current collector foils having a tab portion and a paddle portion; forming a plurality of electrodes by positioning one of the plurality of carbon preforms against respective paddle portions of each of the plurality of current collector foils, wherein each of the plurality of electrodes comprises one of the plurality of current collector foils and one of the plurality of carbon preforms; stacking each of the plurality of electrodes such that tab portions of adjacent ones of the plurality of current collector foils are offset, thereby forming an electrode stack; interposing respective porous separator portions between each of the plurality of electrodes, wherein the porous separator portions function as electrical insulators between the adjacent ones of the plurality of electrodes preventing electrical shType: ApplicationFiled: February 13, 2001Publication date: September 13, 2001Inventors: C. Joseph Farahmandi , John M. Dispennette , Edward Blank
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Patent number: 6233135Abstract: A single cell, multi-electrode high performance double layer capacitor includes an electrode stack adapted to fit within a capacitor container. The electrode stack comprises a plurality of electrodes, each comprising a current collector foil and a carbon cloth impregnated with a specified metal in direct physical contact with the current collector foil. The current collector foils of alternating electrodes are coupled to the first capacitor terminal, and the current collector foils of other alternating electrodes are coupled to the second capacitor terminal. A porous separator material is positioned between each electrode of the electrode stack, and has pores therein through which ions may readily pass while preventing adjacent electrodes from electrically contacting each other. The capacitor case comprises a first part and a second part fastenable to each other to form a sealed capacitor case which has a first capacitor terminal and a second capacitor terminal associated therewith.Type: GrantFiled: August 18, 1999Date of Patent: May 15, 2001Assignee: Maxwell Energy Products, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Robert W. Crawford
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Patent number: 6094788Abstract: A method of making a double layer capacitior includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of one stack being interleaved with the electrodes of the other stack to form an interleaved stack, and with the electrodes of each stack being electrically connected to respective capacitor terminals. A porous separator is positioned against the electrodes of one stack before interleaving to prevent electrical shorts between the electrodes. The electrodes are made by folding a compressible, low resistance, aluminum-impregnated carbon cloth, made from activated carbon fibers, around a current collector foil, with a tab of the foils of each electrode of each stack being connected in parallel and connected to the respective capacitor terminal.Type: GrantFiled: January 19, 1999Date of Patent: August 1, 2000Assignee: Maxwell Energy Products, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Alan C. Kolb
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Patent number: 6059847Abstract: A high performance double layer capacitor having an electric double layer formed in the interface between activated carbon and an electrolyte is disclosed. The high performance double layer capacitor includes a pair of aluminum impregnated carbon composite electrodes having an evenly distributed and continuous path of aluminum impregnated within an activated carbon fiber preform saturated with a high performance electrolytic solution. The high performance double layer capacitor is capable of delivering at least 5 Wh/kg of useful energy at power ratings of at least 600 W/kg.Type: GrantFiled: July 26, 1996Date of Patent: May 9, 2000Assignee: Maxwell Energy Products, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette
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Patent number: 5907472Abstract: A single cell, multi-electrode high performance double layer capacitor includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of one stack being interleaved with the electrodes of the other stack to form an interleaved stack, and with the electrodes of each stack being electrically connected to respective capacitor terminals. A porous separator sleeve is inserted over the electrodes of one stack before interleaving to prevent electrical shorts between the electrodes. The electrodes are made by folding a compressible, low resistance, aluminum-impregnated carbon cloth, made from activated carbon fibers, around a current collector foil, with a tab of the foils of each electrode of each stack being connected in parallel and connected to the respective capacitor terminal.Type: GrantFiled: May 29, 1998Date of Patent: May 25, 1999Assignee: Maxwell Laboratories, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Alan C. Kolb
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Patent number: 5862035Abstract: A single cell, multi-electrode high performance double layer capacitor includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of one stack being interleaved with the electrodes of the other stack to form an interleaved stack, and with the electrodes of each stack being electrically connected to respective capacitor terminals. A porous separator sleeve is inserted over the electrodes of one stack before interleaving to prevent electrical shorts between the electrodes. The electrodes are made by folding a compressible, low resistance, aluminum-impregnated carbon cloth, made from activated carbon fibers, around a current collector foil, with a tab of the foils of each electrode of each stack being connected in parallel and connected to the respective capacitor terminal.Type: GrantFiled: October 7, 1996Date of Patent: January 19, 1999Assignee: Maxwell Energy Products, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette, Edward Blank, Alan C. Kolb
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Patent number: 5777428Abstract: A high performance double layer capacitor having an electric double layer formed in the interface between activated carbon and an electrolyte is disclosed. The high performance double layer capacitor includes a pair of aluminum impregnated carbon composite electrodes having an evenly distributed and continuous path of aluminum impregnated within an activated carbon fiber preform saturated with a high performance electrolytic solution. The high performance double layer capacitor is capable of delivering at least 5 Wh/kg of useful energy at power ratings of at least 600 W/kg.Type: GrantFiled: July 26, 1996Date of Patent: July 7, 1998Assignee: Maxwell Energy Products, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette
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Patent number: 5621607Abstract: A high performance double layer capacitor having an electric double layer formed in the interface between activated carbon and an electrolyte is disclosed. The high performance double layer capacitor includes a pair of aluminum impregnated carbon composite electrodes having an evenly distributed and continuous path of aluminum impregnated within an activated carbon fiber preform saturated with a high performance electrolytic solution. The high performance double layer capacitor is capable of delivering at least 5 Wh/kg of useful energy at power ratings of at least 600 W/kg.Type: GrantFiled: October 7, 1994Date of Patent: April 15, 1997Assignee: Maxwell Laboratories, Inc.Inventors: C. Joseph Farahmandi, John M. Dispennette