Patents by Inventor Marcel Ropars

Marcel Ropars 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).

  • Method and device for analyzing the COcontained in a drilling fluid
    Patent number: 7666679
    Abstract: A method for estimating the quantity of CO2 present in a geologic formation and a device for implementing the method include the steps of penetrating the formation by a well drilled from the surface contacting formation with a fluid that travels from the formation to the surface sampling a given quantity of return fluid at the surface and transferring it to a cell, ensuring the pH of the quantity of fluid, adding a given quantity of product acidifying the fluid to adjust the pH to a value of less than 4, and measuring the CO2 level of the gas in the cell after the acidification step.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 23, 2010
    Assignee: Institut Francais du Petrole
    Inventors: Benjamin Herzhaft, Marcel Ropars, Thierry Huard, Laurent Neau
  • Method and device for analyzing the CO2 contained in a drilling fluid
    Publication number: 20040203160
    Abstract: The invention relates to a method for estimating the quantity of CO2 present in a geologic formation (20) comprising the following steps:
    Type: Application
    Filed: March 11, 2004
    Publication date: October 14, 2004
    Inventors: Benjamin Herzhaft, Marcel Ropars, Thierry Huard, Laurent Neau
  • Textile preforms sheathed in a boron nitride coating, composites incorporating them and their preparation
    Patent number: 6284358
    Abstract: The present invention provides: fiber preforms sheathed in a boron nitride coating, said coating (generated on said previously-prepared fiber preforms) having a structure that is original: microporous and granular; thermostructural composite materials in which the reinforcing fabric is constituted by said fiber preforms; and methods of preparing said fiber preforms and said thermostructural composite materials, respectively. The composites of the invention have their fiber preforms, based on fibers (F), sheathed in an original interphase (IBN) and embedded in the densification matrix (M).
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: September 4, 2001
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.M.C.A.
    Inventors: Michel Parlier, Marcel Ropars, Michel Vaultier, Eric Framery, Jean-Marie Jouin, Jean-Claude Cavalier
  • Thermoset polymers and prepolymers with rapid curing, obtained by polycondensation of pyridine derivatives and aromatic dialdehydes and adding of phenolic compounds
    Patent number: 4642264
    Abstract: The object of the present invention are new thermoset resins having quickened curing, a process for their preparation, and their applications. The resins according to the invention consist, at least in part, of the products resulting from the polycondensation of one or more pyridine derivatives containing at least two methyl groups in the 2, 4 or 6 positions, with one or more aromatic dialdehydes, and the addition of one or more additives consisting of phenol compounds. These resins are used to the fabrication of composite materials.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: February 10, 1987
    Assignees: Societe Nationale des Poudres et Explosifs, Office National d'Etudes et de Recherches Aerospatiales
    Inventors: Marcel Ropars, Bertrand Bloch
  • Thermoset polymers and prepolymers obtained by polycondensation of alkyl pyridine with hydroxyl aromatic monoaldehydes
    Patent number: 4525573
    Abstract: The object of the invention are new thermoset polymers and prepolymers, a process for their preparation, and their uses. The new thermoset prepolymers consist, at least in part, of the polycondensation products of one or more pyridine derivatives containing at least two activated methyl groups with one or more aromatic monoaldehydes containing at least one hydroxyl group. These prepolymers are used to prepare composite materials, in particular laminates, that can be used at high temperatures.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: June 25, 1985
    Assignees: Societe Nationale des Poudres et Explosifs, Office National d'Etudes et de Recherches Aerospatiales
    Inventors: Marcel Ropars, Bertrand Bloch