Patents by Inventor Carlo Marzorati

Carlo Marzorati 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).

  • Method for purifying linuron
    Patent number: 5103044
    Abstract: In order to remove traces of impurities constituted by tetrachloroazobenzene, tetrachloroazoxybenzene, polychlorinated diphenyl compounds and the like from crude linuron, the crude linuron is subjected to a single purification treatment of dissolution in a hot organic solvent and subsequent crystallization by cooling and recovery of the precipitated linuron. Preferred solvents are aromatic solvents, preferably chlorinated. The treatment enables the impurity content to be reduced to values less than 1 ppm.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: April 7, 1992
    Assignee: I.Pi.Ci. S.p.A.
    Inventors: Carlo Marzorati, Gian P. Marinelli