Patents by Inventor Raphael Pi

Raphael Pi 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 water-free detergent mixtures
    Patent number: 5589450
    Abstract: Water-free detergent mixtures may be obtained by reacting secondary or tertiary amines with alkylating agents, in a per se known manner, in the presence of fatty alcohol polyglycol ethers with a HLB value in a range from 6 to 12, but without adding water or organic solvents. These products are suitable for preparing surface-active agents.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: December 31, 1996
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Raphael Pi, Joaquim Bigorra-Losas, Oriol Ponsati-Obiols, Karl Schmid