Patents by Inventor Pierre Ailloud

Pierre Ailloud 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 recovery of toluene diisocyanate
    Patent number: 4216063
    Abstract: A process for the continuous and automatic separation of toluene diisocyanate, without decomposition, from distillation residues comprising evaporating toluene diisocyanate in an agitated, scraped evaporator, under a vacuum of about 1 mm Hg to about 50 mm Hg and at a temperature of about 210.degree. C. to about 250.degree. C., with a minimum residence time, preferably about 15 minutes, in an evaporator, and continuously extracting the remaining components of the residue.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: August 5, 1980
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Pierre Ailloud, Philippe D'Haussy