Patents by Inventor Pierre Aldebert

Pierre Aldebert 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).

  • Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes
    Patent number: 6425944
    Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: July 30, 2002
    Assignees: Commissriat a l'Energie Atomique, Centr National de la Recherche Scientifique
    Inventors: Sylvain Faure, Michel Pineri, Pierre Aldebert, Régis Mercier, Bernard Sillion
  • Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes
    Patent number: 6376129
    Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: April 23, 2002
    Assignee: Commissariat a L'Energie Atomique
    Inventors: Sylvain Faure, Michel Pineri, Pierre Aldebert, Régis Mercier, Bernard Sillion
  • Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes
    Publication number: 20010020082
    Abstract: The invention relates to sulphonated polyimides, notably of formula (I) 1
    Type: Application
    Filed: April 20, 2001
    Publication date: September 6, 2001
    Inventors: Sylvain Faure, Michel Pineri, Pierre Aldebert, Regis Mercier, Bernard Sillion
  • Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes
    Publication number: 20010019787
    Abstract: The invention relates to sulphonated polymides, notably of formula (I) 1
    Type: Application
    Filed: April 20, 2001
    Publication date: September 6, 2001
    Inventors: Sylvain Faure, Michel Pineri, Pierre Aldebert, Regis Mercier, Bernard Sillion
  • Sulphonated polyimides, membranes and fuel cell
    Patent number: 6245881
    Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: June 12, 2001
    Assignees: Commissariat a l'Energie Atomique, Centre National de la Recherche Scientifique
    Inventors: Sylvain Faure, Michel Pineri, Pierre Aldebert, Régis Mercier, Bernard Sillion
  • Large bandwidth optical fibers
    Patent number: 4560247
    Abstract: Multimode optical fibers are described comprising a cylindrical core with a radius a.sub.o exhibiting an index of refraction n.sub.o surrounded by a cladding having an outer radius a in which the index of refraction varies continually from the core to the periphery from a value of n.sub.1 to a lower value n.sub.e. Between the core and cladding there is a step change .DELTA.n in their respective indices of refraction whose value is a function of the ratio a.sub.o /a. Such fibers have both slight attenuation and slight dispersion and can be manufactured using processes similar to those used in making step-index optical fibers.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: December 24, 1985
    Assignee: Quartz et Silice
    Inventor: Pierre Aldebert