Patents by Inventor Rene Avrillon

Rene Avrillon 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).

  • Highly selective asymmetric membranes for gas separation
    Patent number: 5674629
    Abstract: A highly selective asymmetric membrane for gas separation is provided which comprises rigid aromatic polyimide or copolyimide polymers comprising the monomers diphenyldi(trifluoromethyl)methane 3,4,3',4'-tetracarboxylic acid adianhydride and a monoaromatic metadiamine or a mixture of monoaromatic metadiamines.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: October 7, 1997
    Assignee: Institut Francais du Petrole
    Inventor: Rene Avrillon
  • Highly selective asymmetric membranes for gas separation and method for the manufacture thereof
    Patent number: 5633039
    Abstract: A method for preparing highly selective asymmetric polymer membranes for gas separation is provided wherein the polymer is dissolved in a volatile solvent containing dioxane, and a film or tube extrusion of the polymer solution is formed. Some of the solvent is evaporated and the film or tube is contacted with a coagulant comprising acetic acid and water. The film or the tube is then dried.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: May 27, 1997
    Assignee: Institut Francais du Petrole
    Inventor: Rene Avrillon
  • Gas separation membrane
    Patent number: 5076816
    Abstract: A gas separation membrane, comprising a film with a thickness ranging from 0.05-10.sup.-6 to 20.10.sup.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: December 31, 1991
    Assignee: Institut Francais du Petrole
    Inventors: Rene Avrillon, Andre Descamps, Alain Driancort, Jean-Claude Mileo, Eric Robert
  • Gas separation membrane
    Patent number: 5071452
    Abstract: Disclosed is a gas separation membrane, comprising a film with a thickness ranging from 0.05.10.sup.-6 to 20.10.sup.-6 m, at least 90% by mole of which is at least one aromatic polyimide or copolyimide, the recurrent unit of which corresponds to the following formula (I): ##STR1## where A represents a tetravalent aromatic radical at least 50% by mole of which are represented by the following formula (II): ##STR2## and B represents a bivalent aromatic radical or a mixture of bivalent aromatic radicals.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: December 10, 1991
    Assignee: Institut Francais du Petrole
    Inventors: Rene Avrillon, Andre Deschamps, Alain Driancourt, Jean-Claude Mileo, Eric Robert
  • Process for purifying hydrocarbons by adsorption
    Patent number: 4152249
    Abstract: A hydrocarbon cut is purified by contact with a solid adsorption resin consisting of a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups and having pores essentially in the range of 6 to 300 Angstroms.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: May 1, 1979
    Assignee: Institut Francais du Petrole
    Inventors: Rene Avrillon, Daniel Defives
  • Process for regenerating lubricating oils
    Patent number: 4045330
    Abstract: Used lubricating oil is contacted with particles of a solid adsorption resin comprising at least 0.1 cc per gram of pores of diameter in the range of 6 to 300 angstroms. The resin is preferably a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups, for example a polycondensate of phenol and formaldehyde. The resin may be reactivated by rinsing with an organic solvent such as an alcohol, a ketone or a chlorinated hydrocarbon.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: August 30, 1977
    Assignee: Institut Francais du Petrole
    Inventors: Rene Avrillon, Daniel Defives