Patents by Inventor Johan Jan W. Eshuis

Johan Jan W. Eshuis 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 production of polyglycerols
    Patent number: 5723696
    Abstract: Glycerol, glycidol, glycerol carbonate or 2,2-dimethyl-1,3-dioxolane-4-methanol is polymerized into preponderantly linear oligomers at 150.degree. C. to 350.degree. C. in the presence of a catalyst, selected from RbF, CsF and/or KF impregnated on alumina and zirconium oxide. The alumina is preferably gamma-alumina.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: March 3, 1998
    Assignee: Unichema Chemie B.V.
    Inventors: Glyn Roberts, Alan Reginald Minihan, Johannes Arie M. Laan, Johan Jan W. Eshuis
  • Polyglycerol production
    Patent number: 5721305
    Abstract: Glycerol, 2,2-dimethyl-1,3-dioxolane-4-methanol (Solketal), glycidol or glycerol carbonate is polymerized into preponderantly linear oligomers at 150.degree. C. to 350.degree. C. in the presence of anionic clay material, preferably hydrotalcite, as a catalyst.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: February 24, 1998
    Assignee: Unichema Chemie B.V.
    Inventors: Johan Jan W. Eshuis, Johannes Arie M. Laan, Glyn Roberts