Patents by Inventor Philippe Duval

Philippe Duval 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: 11946594
    Abstract: Mobile cryogenic tank for transporting cryogenic fluid, notably liquefied hydrogen or helium, comprising an internal shell intended to contain the cryogenic fluid, an external shell arranged around the internal shell and delimiting a space between the two shells, said space containing a thermal insulator, the first shell having a cylindrical overall shape extending along a central longitudinal axis (A), when the tank is in the configuration for transport and use, the central longitudinal axis (A) being oriented horizontally, the tank comprising a set of temperature sensors measuring the temperature of the fluid in the internal shell, characterized in that the set of temperature sensors is situated on the external face of the internal shell and measure the temperature of said shell, the set of temperature sensors comprising a lower sensor positioned at the lower end of the internal shell situated below the central longitudinal axis (A), the set of temperature sensors further comprising a plurality of intermedi
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: April 2, 2024
    Assignee: L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Lucien Varrassi, Philippe Cadeau, Thomas Fayer, Stephane Duval
  • Patent number: 8222955
    Abstract: An integrated circuit has an untrimmed bandgap generation circuit; and a bandgap generation circuit coupled to the untrimmed bandgap generation circuit. The bandgap generation circuit has a current source controlled by the untrimmed bandgap generation circuit and coupled in series with a resistor and a first bipolar diode device, one or more of bipolar diode devices, each bipolar diode device coupled in parallel with the first bipolar diode device, wherein a trimmed bandgap reference voltage output of the integrated circuit is a function of the number of bipolar diode devices.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: July 17, 2012
    Assignee: Microchip Technology Incorporated
    Inventors: Philippe Duval, Yann Johner, Fabien Vaucher
  • Publication number: 20110074495
    Abstract: An integrated circuit has an untrimmed bandgap generation circuit; and a bandgap generation circuit coupled to the untrimmed bandgap generation circuit. The bandgap generation circuit has a current source controlled by the untrimmed bandgap generation circuit and coupled in series with a resistor and a first bipolar diode device, one or more of bipolar diode devices, each bipolar diode device coupled in parallel with the first bipolar diode device, wherein a trimmed bandgap reference voltage output of the integrated circuit is a function of the number of bipolar diode devices.
    Type: Application
    Filed: June 18, 2010
    Publication date: March 31, 2011
    Inventors: Philippe Duval, Yann Johner, Fabien Vaucher
  • Patent number: 6869067
    Abstract: The invention relates to a spring suspension system comprising a helical spring, a sheath, and at least one centering and bearing cup, said spring having an end turn with at least a fraction thereof being covered by said sheath, and which is centered on and bears against said centering and bearing cup. The sheath presents an opening extending around the inner periphery of the sheath and facing towards the spring axis. The fraction of the end turn covered by the sheath is centered on and bears against the centering and bearing cup via spacer means between said sheath and said centering and bearing cup.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: March 22, 2005
    Assignee: Allevard Rejna Autosuspensions
    Inventors: Philippe Duval, Roger Henri
  • Publication number: 20040094879
    Abstract: The invention relates to a spring suspension system comprising a helical spring, a sheath, and at least one centering and bearing cup, said spring having an end turn with at least a fraction thereof being covered by said sheath, and which is centered on and bears against said centering and bearing cup. The sheath presents an opening extending around the inner periphery of the sheath and facing towards the spring axis. The fraction of the end turn covered by the sheath is centered on and bears against the centering and bearing cup via spacer means between said sheath and said centering and bearing cup.
    Type: Application
    Filed: June 13, 2003
    Publication date: May 20, 2004
    Inventors: Philippe Duval, Roger Henri
  • Publication number: 20010034721
    Abstract: A system and method for providing services to a remote user through a network is provided. The user is identified through a user personal CD card readable in a CD reading device of a terminal, and a user personal identification number (PIN) entered on this terminal. The PIN and card-identifying elements are transmitted from the terminal to a remote server through the network, and matched to a user profile on the server, thereby identifying the user. The identified user may be provided with access to at least one service application on said server, such as access to a restricted system or financial transactions.
    Type: Application
    Filed: February 14, 2001
    Publication date: October 25, 2001
    Inventors: Jean-Pierre Boudreau, Alain Fortin, Philippe Duval, Michel Tyers
  • Patent number: 5069386
    Abstract: This invention relates to a clip for fastening a rail of a railway on a rail support comprising: a spring clip forming a device for fastening or clamping the rail on a rail support, constituted by a clip made of elastic metal having a first end and a second end and presenting successively, from the first end, a first section forming a substantially rectilinear arm, a second section forming a substantially 180.degree. bend, a third section, a fourth section forming a substantially 180.degree.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 3, 1991
    Assignee: Allevard Industries
    Inventor: Philippe Duval
  • Patent number: 4738694
    Abstract: A gas is purified by adsorption on activated carbon contained in an adsorber vessel. The carbon is desorbed by passing an inert gas therethrough at a sufficiently high temperature. The desorbed impurity is removed by refrigeration and the refrigeration is supplied by the vaporization of an inert gas in liquid phase. This vaporized inert gas, in turn, comprises the desorption gas.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: April 19, 1988
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Claude Godino, Philippe Duval, Benoit Ghnassia-Daudin
  • Patent number: 4571659
    Abstract: The analog electronic trip device comprises a time-lag tripping circuit formed by a non-linear function generator likely to elaborate by approximation the tripping characteristic of the circuit breaker.The device includes an integrating amplifier comprising a negative-feedback capacitor C and two inputs in phase opposition. One of the inputs is submitted to two threshold voltages V.sub.R1, V.sub.R2 determining the mode of long-time delay or short-time delay operation of the trip device. The second threshold voltage V.sub.R2 is set by a resistive switch which determines the short delay tripping threshold.
    Type: Grant
    Filed: July 13, 1983
    Date of Patent: February 18, 1986
    Assignee: Merlin Gerin
    Inventors: Pierre Demeyer, Philippe Duval