Patents by Inventor Andre Collart

Andre Collart 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 manufacturing heat-stable oxymethylene copolymers
    Patent number: 4772662
    Abstract: Process for manufacturing oxymethylene copolymers stabilized against thermal degradation, comprising the heating of the copolymer in a medium containing water and a disubstituted cellulose ether.
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: September 20, 1988
    Assignee: Solvay & Cie. (Societe Anonyme)
    Inventors: Andre Collart, Fredy Declerck
  • Oxymethylene copolymers and process for their preparation
    Patent number: 4691000
    Abstract: Copolymers containing oxymethylene and 2-fluoromethoxyethylene repeat units. These copolymers, of improved heat stability, may be prepared by copolymerizing trioxane with a derivative of a cyclic ether whose molecule contains at least two adjacent carbon atoms and in which an oxymethylene group carries a fluoromethyl substituent, especially epifluorohydrin.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: September 1, 1987
    Assignee: Solvay & Cie. (Societe Anonyme)
    Inventors: Andre Collart, Fredy Declerck