Patents by Inventor Friedrich Arndt

Friedrich Arndt 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 controlling the growth of weeds in a field containing growing plants of cotton
    Patent number: 4065293
    Abstract: Alkyl N-3-carbamoyloxyphenyl-carbamates of the formula ##STR1## selectively damage or destroy weeds in crops of carrots, cotton, peanuts, and rice without damaging the crop plants when R.sub.1 is lower alkyl, allyl, or halo-lower-alkyl; R.sub.2 is lower alkyl, allyl, halo-lower alkyl, lower alkinyl, cyclohexyl, benzyl, or phenylethyl; R.sub.3 is methyl and ethyl; and X is oxygen or sulfur. Lower alkyl and lower alkinyl in the formula have up to four carbon atoms.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: December 27, 1977
    Assignee: Schering Aktiengesellschaft
    Inventors: Gerhard Boroschewski, Friedrich Arndt
  • Method of controlling weed growth in rice fields with tri-n-butyl tin imidazole
    Patent number: 4061491
    Abstract: Compounds having herbicidal and algicidal action are provided of the general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different alkyl radicals, and R.sub.4 is an acid radical, or the radical of an acid compound or is ##STR2## with R.sub.1 ', R.sub.2 ', and R.sub.3 ' having the meaning of R.sub.1, R.sub.2 or R.sub.3 respectively, and wherein X represents oxygen or sulfur.
    Type: Grant
    Filed: March 11, 1975
    Date of Patent: December 6, 1977
    Assignee: Schering Aktiengesellschaft
    Inventors: Friedrich Arndt, Hans Plum