Patents by Inventor Laszio Toke

Laszio Toke 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 preparation of substituted acyl ureas
    Patent number: 4355178
    Abstract: The invention relates to a process for the preparation of acyl ureas of formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same of different and each is halogen atom, preferably fluorine or chlorine atom, andR.sub.3 is a substituted aryl group.The compounds of the invention can be prepared by reacting an urea of formula (II):R.sub.3 NHCONH.sub.2 (II)wherein R.sub.3 is as defined above, with an acid chloride of formula (III): ##STR2## wherein R.sub.1 and R.sub.2 are as defined above, in an inert organic solvent at a temperature of from 20.degree. C. to 100.degree. C.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: October 19, 1982
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara R.T.
    Inventors: Laszio Toke, Istvan Bitter, Eva Karpati nee Adam, Todor Pfliegel