Patents by Inventor Werner Weigert

Werner Weigert 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).

  • Solutions of oxaphosphorins having improved stability and process for the preparation thereof
    Patent number: 4952575
    Abstract: Solutions comprising oxazaphosphorins having the general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are radicals and at least two of said radicals are 2-chloroethyl and/or 2-mathanesulfonyloxyethyl and the remaining radical is selected from hydrogen, methyl and ethyl; and about 80% to about 100% (v/v) ethanol; wherein the oxazaphosphorin concentration is about 10% to about 70% (w/v); and a process for the preparation thereof.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: August 28, 1990
    Assignee: Asta Pharma Aktiengesellschaft
    Inventors: Dieter Sauerbier, Klaus Molge, Werner Weigert, Otto Issac