Patents by Inventor Mehrdad Mehdizadeh

Mehrdad Mehdizadeh 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: 20210127457
    Abstract: This invention provides improved printed heaters to heat a variety of articles. The improvement comprises replacing the single large area resistive material layer with columns of a number of small patches of resistive material or of continuous resistive material, i.e., replacing the single large area heater with a number of smaller individual heaters. Printing of the resistive material is facilitated since the area of each resistive material patch is greatly reduced. In addition, some embodiments enable the opportunity to provide a breathable heater for use in wearable garments.
    Type: Application
    Filed: January 7, 2021
    Publication date: April 29, 2021
    Inventors: Mark Allan Lamontia, Mehrdad Mehdizadeh
  • Publication number: 20200128627
    Abstract: Heater design plays an important role in determining the stretchability of a heater and this invention provides several configurations that improve stretchability. In some of these configurations the use of bus bars with wavelike form, an undulating conductor, provides good stretchability in all directions. In some configurations, slits can be cut in the substrate to further accommodate stretching and improve breathability.
    Type: Application
    Filed: October 22, 2018
    Publication date: April 23, 2020
    Inventors: MARK ALLAN LAMONTIA, MEHRDAD MEHDIZADEH, MOBIN YAHYAZADEHFAR
  • Publication number: 20190274376
    Abstract: This invention provides improved printed heaters for use in articles such as wearable garments and seats. The improvement comprises replacing the single large area resistive material layer with columns of a number of small patches of resistive material or of continuous resistive material, i.e., replacing the single large area heater with a number of smaller individual heaters. A series of conductive strips across the columns render the heater more robust, less sensitive to local resistive area failure. Printing of the resistive material is facilitated since the area of each resistive material patch is greatly reduced. In addition, the embodiments enable the opportunity to provide a breathable heater.
    Type: Application
    Filed: March 8, 2018
    Publication date: September 12, 2019
    Inventors: WEIYING GAO, Mehrdad Mehdizadeh, Mark Allan Lamontia
  • Publication number: 20190216147
    Abstract: This invention provides gloves and socks containing printed heaters. The glove or sock with a heater comprises a glove or sock, a substrate with the outline of the glove or sock, and a heater printed on the substrate wherein the substrate is laminated to the glove or sock. The heater comprises two printed conductive bus bars with extensions traversing the substrate and an array of printed resistive areas arranged so that each area is between and overlaps and is contiguous to two conductors, one of which is one of the bus bars or its extensions and the second is the other bus bar or its extensions.
    Type: Application
    Filed: August 7, 2018
    Publication date: July 18, 2019
    Inventors: Mark Allan Lamontia, Mehrdad Mehdizadeh, Michael R. Moseley
  • Publication number: 20180368213
    Abstract: This invention provides improved printed heaters to heat a variety of articles. The improvement comprises replacing the single large area resistive material layer with columns of a number of small patches of resistive material or of continuous resistive material, i.e., replacing the single large area heater with a number of smaller individual heaters. Printing of the resistive material is facilitated since the area of each resistive material patch is greatly reduced. In addition, some embodiments enable the opportunity to provide a breathable heater for use in wearable garments.
    Type: Application
    Filed: May 4, 2018
    Publication date: December 20, 2018
    Inventors: Mark Allan Lamontia, MEHRDAD MEHDIZADEH
  • Publication number: 20180289082
    Abstract: This invention provides improved printed heaters for use in wearable garments. The improvement comprises replacing the single large area resistive material layer with a number of small patches of resistive material, i.e., replacing the single large area heater with a number of smaller individual heaters. Printing of the resistive material is facilitated since the area of each resistive material patch is greatly reduced. In addition, some embodiments enable the opportunity to provide a breathable heater.
    Type: Application
    Filed: March 26, 2018
    Publication date: October 11, 2018
    Inventors: MICHAEL ZANONI BURROWS, JOHN C. CRUMPTON, JEFFREY J. G. DEE, DANIEL ANEURIN INNS, MARK ALLAN LAMONTIA, MEHRDAD MEHDIZADEH
  • Publication number: 20140318399
    Abstract: This invention pertains to a process for making flexographic printing forms, particularly relief printing forms, from two or more photosensitive elements welded to one another at their edges, wherein the welding is accomplished by microwave energy. This invention also relates to sealing edges of a cylindrically-shaped photosensitive element. Using microwave energy provides a smooth surface upon welding with a near disappearance of the weld-lines.
    Type: Application
    Filed: July 10, 2014
    Publication date: October 30, 2014
    Inventors: MEHRDAD MEHDIZADEH, JOSEPH ANTHONY PERROTTO
  • Patent number: 8835822
    Abstract: A field director assembly includes electrically conductive vanes configured to prevent arcing in an unloaded microwave oven.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: September 16, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Nicole L. Blankenbeckler, William R. Corcoran, Jr., Dariusz Wlodzimierz Kawka, Mehrdad Mehdizadeh, Ronald Jack Riegert
  • Patent number: 8723090
    Abstract: A reusable self-supporting field director useful for heating an article in a microwave oven is characterized by a plurality of vanes, each vane extending radially outwardly from a central axis and being angularly adjacent to two other vanes. The vanes are attached to each other at their inner ends. Each vane has a substrate formed from an electrically non-conductive material, and an electrically conductive sheath encasing the substrate so that a portion of the first and second major surfaces are covered by an electrically conductive material. The sheath is arranged on the substrate in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: May 13, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Patent number: 8698055
    Abstract: A reusable self-supporting field director for use in heating an article in a microwave oven is characterized by a plurality of vanes, each vane extending radially outwardly from a central axis and being angularly adjacent to two other vanes. The vanes are attached to each other at their inner ends. Each vane has a substrate formed from an electrically non-conductive material and an electrically conductive wrapper that wraps the substrate so that a portion of the first and second major surfaces are covered and the radially outer end of each vane is wrapped by an electrically conductive material. The wrapper and the substrate are arranged in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: April 15, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Patent number: 8598500
    Abstract: A susceptor assembly includes electrically conductive vanes configured to prevent arcing in an unloaded microwave oven.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 3, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Nicole L. Blankenbeckler, William R. Corcoran, Jr., Dariusz Wlodzimierz Kawka, Mehrdad Mehdizadeh, Ronald Jack Riegert
  • Patent number: 8487225
    Abstract: A reusable self-supporting field director for use in a microwave oven is characterized by a plurality of vanes, each extending radially outwardly from a central axis. The vanes are supported in a slotted central support member. Each vane has a predetermined thickness dimension. Each vane comprises a substrate formed from an electrically non-conductive material having a predetermined coefficient of thermal expansion and an electrically conductive wrapper having a predetermined coefficient of thermal expansion that is different from the coefficient of thermal expansion of the substrate. The wrapper wraps the substrate so that a portion of the first and second major surfaces are covered and the radially inner end of each vane is wrapped by an electrically conductive material. The wrapper and the substrate are arranged in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: July 16, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Publication number: 20130139714
    Abstract: This invention pertains to a process for making flexographic printing forms, particularly relief printing forms, from two or more photosensitive elements welded to one another at their edges, wherein the welding is accomplished by microwave energy. This invention also relates to sealing edges of a cylindrically-shaped photosensitive element. Using microwave energy provides a smooth surface upon welding with a near disappearance of the weld-lines.
    Type: Application
    Filed: December 2, 2011
    Publication date: June 6, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: MEHRDAD MEHDIZADEH, Joseph Anthony Perrotto
  • Patent number: 8455802
    Abstract: A reusable self-supporting field director for use in a microwave oven is characterized by a plurality of vanes, each extending radially outwardly from a central axis. The vanes are supported in a slotted central support member. Each vane has a predetermined thickness dimension. Each vane comprises a substrate formed from an electrically non-conductive material having a predetermined coefficient of thermal expansion and an electrically conductive wrapper having a predetermined coefficient of thermal expansion that is different from the coefficient of thermal expansion of the substrate. The wrapper wraps the substrate so that a portion of the first and second major surfaces are covered and the radially inner end of each vane is wrapped by an electrically conductive material. The wrapper and the substrate are arranged in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: June 4, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Patent number: 8338764
    Abstract: A reusable self-supporting field director for use in heating an article in a microwave oven is characterized by a plurality of vanes, each vane extending radially outwardly from a central axis and being angularly adjacent to two other vanes. The vanes are attached to each other at their inner ends. Each vane has a substrate formed from an electrically non-conductive material, and an electrically conductive sheath encasing the substrate so that a portion of the first and second major surfaces are covered by an electrically conductive material. The sheath is arranged on the substrate in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: December 25, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Patent number: 8338765
    Abstract: A reusable self-supporting field director for use in heating an article in a microwave oven is characterized by a plurality of vanes, each vane extending radially outwardly from a central axis and being angularly adjacent to two other vanes. The vanes are attached to each other at their inner ends. Each vane has a substrate formed from an electrically non-conductive material and an electrically conductive wrapper that wraps the substrate so that a portion of the first and second major surfaces are covered and the radially outer end of each vane is wrapped by an electrically conductive material. The wrapper and the substrate are arranged in a laterally symmetric fashion so that thermal expansion effects due to heating are equalized across the thickness of each vane.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: December 25, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, William R. Corcoran, Jr.
  • Publication number: 20120312810
    Abstract: A susceptor assembly comprises a generally planar susceptor having an electric field director structure mechanically connected thereto. The field director structure includes at least one, but more preferably, a plurality of two or more vanes mechanically connected to the susceptor. Each vane has a surface at least a portion of which is electrically conductive. The vane(s) are most preferably disposed substantially orthogonal to the planar susceptor. The connection may be either a fixed or a flexible articulating connection. In use, such as in the presence of a standing electromagnetic wave generated within a microwave oven, only an attenuated electric field component of the electromagnetic wave exists in a plane tangent to the surface of the vane in the vicinity of the conductive portion of the vane.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 13, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Nicole L. Blankenbeckler, Cheng-Hang Chi, Mehrdad Mehdizadeh, Ronald Jack Riegert
  • Patent number: 8217324
    Abstract: A susceptor assembly includes a generally planar susceptor having an electric field director structure mechanically connected thereto. The field director structure includes at least one, but more preferably, a plurality of two or more vanes mechanically connected to the susceptor. Each vane has a surface at least a portion of which is electrically conductive. The vane(s) are most preferably disposed substantially orthogonal to the planar susceptor. The connection may be either a fixed or a flexible articulating connection. In use, such as in the presence of a standing electromagnetic wave generated within a microwave oven, only an attenuated electric field component of the electromagnetic wave exists in a plane tangent to the surface of the vane in the vicinity of the conductive portion of the vane.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: July 10, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Cheng-Hang Chi, Nicole L. Blankenbeckler, Mehrdad Mehdizadeh, Ronald Jack Riegert
  • Patent number: 7760141
    Abstract: A method for coupling a radio frequency electronic device (14) to a passive element (12), such as an antenna, the passive element including a body having an impedance at the operating frequency. the method comprises the steps of attaching a conductive pad having a shape and area corresponding to the predetermined shape and coupling area on the surface of passive element in a nonpenetrating manner, and electrically connecting the device to the conductive pad, such that, in use, the pad and the body have an impedance that is substantially capacitively reactive in nature defined therebetween, whereby the pad is electrically coupled to the body to facilitate: the transfer of electromagnetic energy at the operating radio frequency between the body and the pad. The conductive pad may take the form of a discrete conductive member attached to the passive element by an adhesive or by a biasing member. Alternatively, the conductive pad may take the form of a metallization layer formed on the passive element.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: July 20, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Mehrdad Mehdizadeh
  • Patent number: 7616076
    Abstract: A coupling structure for coupling a device operable at a radio frequency with a body is formed of a polymeric material loaded with a conductive filler. A portion of the surface of the body defines a coupling area of a predetermined shape that receives a conductive pad having a shape and area corresponding to the predetermined shape and coupling area. The conductive pad is positioned on the surface of the body in non-penetrating contact with the body such that, in use, the pad and the body have an impedance, substantially capacitively reactive in nature, defined therebetween that is less than the impedance of the body at the operating frequency, thereby facilitating the transfer of electromagnetic energy at the operating radio frequency between the body and the pad.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: November 10, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Mehrdad Mehdizadeh