Patents by Inventor Daniel Defives

Daniel Defives 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).

  • 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
  • Process for regenerating used lubricating oils
    Patent number: 3990963
    Abstract: Used lubricating oils are first heated to 200.degree.-500.degree. C, optionally with added steam, and then filtered through a membrane such as an ultra-filtration membrane. The latter has preferably a cut range of from 5,000 to 300,000.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: November 9, 1976
    Assignee: Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrollieres Elf
    Inventors: Francois Audibert, Maurice Born, Daniel Defives, Xavier Marze