Patents by Inventor Jean-Luc Leclere

Jean-Luc Leclere 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 the manufacture of urea-formaldehyde resins
    Patent number: 5034500
    Abstract: Urea-formaldehyde resins, particularly useful for producing particle boards having lower rates of release of formaldehyde are synthesized in several stages including a stage of further condensing a first condensate having a F/U molar ratio of 1.8-2.3 and which was condensed at a pH of between 6 and 8. The further condensing is conducted at a pH of between 6 and 8 until a cloud point with water is reached at 10.degree.-40.degree. C. making it possible to obtain resins which are reactive and stable during storage.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: July 23, 1991
    Assignee: Norsolor (Orkem Group)
    Inventors: Roger Garrigue, Jack Lalo, Jean-Luc Leclere