Patents by Inventor Ronald Jack Riegert

Ronald Jack Riegert 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: 9099592
    Abstract: An optical element has a plano-plano body formed of a first material having a greater refraction index n1 and a second material having a lesser refraction index n2. Both indices are greater than one. The absolute value of the index contrast, log10 (n1/n2), is in the range from about 0.001 to about 0.17, preferably from about 0.01 to about 0.05. The materials have an induced absorbance rate ?Abs/Dose less than or equal to about 0.4, preferably less than or equal to about 0.2. The materials are arranged such that an interface with at least one cusp is defined therebetween. The cusp has an apex pointed toward the material having the greater index of refraction. The cusp is operative to produce a region of increased light intensity on one surface of the optical element in response to light incident on the other surface of the optical element.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: August 4, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Rebekah Ann Derryberry, Roger Harquail French, Mark E. Lewittes, Ronald Jack Riegert, Jose Manuel Rodriguez-Parada
  • 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: 8648248
    Abstract: A photovoltaic assembly includes an optical element comprising a body having opposed planar major surfaces with a plurality of open-mouthed inclusions (grooves) formed on the light output surface. Each groove has a closed apex with an included apex angle. The body is formed from a material having an index of refraction of at least 1.3 and an induced absorbance rate ?Abs/Dose less than or equal to about 0.4. The optical element is attached to a photovoltaic cell using an adhesive having an index of refraction in the range from about 1.34 to 1.50. The apex angle is selected such that light incident upon the body is conveyed the light output surface by the mechanism of total internal reflection from the boundary walls of the grooves and/or without retro-reflection toward the incident surface. The thickness of the adhesive layer and the dimension of the mouth of the grooves are selected such that light incident on the surface of the photovoltaic cell is not obscured by conductor lines on the cell's surface.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: February 11, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Jose Manuel Rodriguez-Parada, Ronald Jack Riegert, Mark E. Lewittes, Roger Harquail French
  • 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: 8441735
    Abstract: An optical element comprises a body having opposed planar major surfaces with a plurality of open-mouthed inclusions (grooves) formed on its light output surface. Each groove has a closed apex with an included apex angle. The body is formed from a material having an index of refraction of at least 1.3 and an induced absorbance rate ?Abs/Dose less than or equal to about 0.4. The apex angle is selected such that light incident upon the body is conveyed the light output surface by the mechanism of total internal reflection from the boundary walls of the grooves and/or without retro-reflection toward the incident surface.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: May 14, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Jose Manuel Rodriguez-Parada, Ronald Jack Riegert, Mark E. Lewittes, Roger Harquail French
  • 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
  • Publication number: 20120248559
    Abstract: An optical element has a plano-plano body formed of a first material having a greater refraction index n1 and a second material having a lesser refraction index n2. Both indices are greater than one. The absolute value of the index contrast, log10(n1/n2), is in the range from about 0.001 to about 0.17, preferably from about 0.01 to about 0.05. The materials have an induced absorbance rate ?Abs/Dose less than or equal to about 0.4, preferably less than or equal to about 0.2. The materials are arranged such that an interface with at least one cusp is defined therebetween. The cusp has an apex pointed toward the material having the greater index of refraction. The cusp is operative to produce a region of decreased light intensity on one surface of the optical element in response to light incident on the other surface of the optical element.
    Type: Application
    Filed: July 12, 2011
    Publication date: October 4, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: REBEKAH ANN DERRYBERRY, ROGER HARQUAIL FRENCH, MARK E. LEWITTES, RONALD JACK RIEGERT, JOSE MANUEL RODRIGUEZ-PARADA
  • Publication number: 20120229911
    Abstract: An optical element comprises a body having opposed planar major surfaces with a plurality of open-mouthed inclusions (grooves) formed on its light output surface. Each groove has a closed apex with an included apex angle. The body is formed from a material having an index of refraction of at least 1.3 and an induced absorbance rate ?Abs/Dose less than or equal to about 0.4. The apex angle is selected such that light incident upon the body is conveyed the light output surface by the mechanism of total internal reflection from the boundary walls of the grooves and/or without retro-reflection toward the incident surface.
    Type: Application
    Filed: July 12, 2011
    Publication date: September 13, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Jose Manuel Rodriguez-Parada, Ronald Jack Riegert, Mark E. Lewittes, Roger Harquail French
  • 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
  • Publication number: 20120067400
    Abstract: Various photovoltaic apparatus such as an optical coupling arrangement, an integrated photovoltaic cell assembly, a photovoltaic module or a concentrating photovoltaic system each include an optical element having a plano-piano body formed of a first material having a greater refraction index n1 and a second material having a lesser refraction index n2. Both indices are greater than one. The absolute value of the index contrast, log10 (n1/n2), is in the range from about 0.001 to about 0.17, preferably from about 0.01 to about 0.05. The materials have an induced absorbance rate ?Abs/Dose less than or equal to about 0.4, preferably less than or equal to about 0.2. The materials are arranged such that an interface with at least one cusp is defined therebetween.
    Type: Application
    Filed: July 12, 2011
    Publication date: March 22, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Rebekah Ann Derryberry, Roger Harquail French, Mark E. Lewittes, Ronald Jack Riegert, Jose Manuel Rodriguez-Parada
  • Publication number: 20120069580
    Abstract: An optical element has a plano-piano body formed of a first material having a greater refraction index n1 and a second material having a lesser refraction index n2. Both indices are greater than one. The absolute value of the index contrast, log10 (n1/n2), is in the range from about 0.001 to about 0.17, preferably from about 0.01 to about 0.05. The materials have an induced absorbance rate ?Abs/Dose less than or equal to about 0.4, preferably less than or equal to about 0.2. The materials are arranged such that an interface with at least one cusp is defined therebetween. The cusp has an apex pointed toward the material having the greater index of refraction. The cusp is operative to produce a region of increased light intensity on one surface of the optical element in response to light incident on the other surface of the optical element.
    Type: Application
    Filed: July 12, 2011
    Publication date: March 22, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Rebekah Ann DERRYBERRY, Roger Harquail FRENCH, Mark E. LEWITTES, Ronald Jack RIEGERT, Jose Manuel RODRIGUEZ-PARADA
  • Publication number: 20120055551
    Abstract: A photovoltaic assembly includes an optical element comprising a body having opposed planar major surfaces with a plurality of open-mouthed inclusions (grooves) formed on the light output surface. Each groove has a closed apex with an included apex angle. The body is formed from a material having an index of refraction of at least 1.3 and an induced absorbance rate ?Abs/Dose less than or equal to about 0.4. The optical element is attached to a photovoltaic cell using an adhesive having an index of refraction in the range from about 1.34 to 1.50. The apex angle is selected such that light incident upon the body is conveyed the light output surface by the mechanism of total internal reflection from the boundary walls of the grooves and/or without retro-reflection toward the incident surface. The thickness of the adhesive layer and the dimension of the mouth of the grooves are selected such that light incident on the surface of the photovoltaic cell is not obscured by conductor lines on the cell's surface.
    Type: Application
    Filed: July 12, 2011
    Publication date: March 8, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: JOSE MANUEL RODRIQUEZ-PARADA, Ronald Jack Riegert, Mark E. Lewittes, Roger Harquail French
  • Patent number: 6287531
    Abstract: Hydrogen cyanide is produced by reacting ammonia and a hydrocarbon gas in the presence of a platinum-group-metal catalyst while the catalyst is heated by induction heating at a frequency of 0.5 to 30 MHz.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: September 11, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ronald Jack Riegert, Mehrdad Mehdizadeh
  • Patent number: 6030490
    Abstract: A bonding apparatus for bonding a thermoplastic pad having a predetermined peripheral shape to a first surface of a carpet using radio frequency energy includes a die electrode and a backing electrode. Both the die electrode and the backing electrode have a peripheral shape that corresponds to the peripheral shape of the pad. In addition, both the die electrode and the backing electrode may have a relief feature thereon that are correspondingly sized and located. Concentrations of electric field intensity in the vicinity of the peripheral edge of the die electrode and along the edges of the relief feature on the die electrode are minimized so that bonding of a pad to a carpet may be effected without thermal runaway. The pad is bonded to the carpet without the occurrence of localized burning of the carpet pile or perforation of the pad.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: February 29, 2000
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Harry Bernard Francisco, Ronald Jack Riegert
  • Patent number: 5724151
    Abstract: A waveguide sensing element has a substrate having an input opening adapted to house an input optical fiber and an output opening adapted to house an output optical fiber. The input optical fiber transmits electromagnetic radiation, and the output optical fiber emits the electromagnetic radiation. The waveguide sensing element also has a guiding layer disposed adjacent the substrate. The guiding layer has a beveled end face. The angle of the bevel is chosen so that the guiding layer selects only those modes within a given range--i.e., high order modes. This increases the spectral absorption measurement sensitivity as compared to a waveguide sensing element which uses the complete mode spectrum. Such a highly sensitive waveguide sensing element has been found to be particularly useful as an internal reflection spectroscopic sensing element.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: March 3, 1998
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: James Francis Ryley, Joseph Anthony Perrotto, Moshe Oren, Ronald Jack Riegert