Patents by Inventor Mary J. Zestermann

Mary J. Zestermann 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).

  • Polyalkylated 4-aminopiperidine derivatives as stabilizers for synthetic polymers
    Patent number: 4316837
    Abstract: Polyalkylated 4-aminopiperidine derivatives having the formula: ##STR1## wherein R is a C.sub.1 -C.sub.19 alkyl group, a cycloalkyl group of from 5 to 7 carbon atoms, an unsubstituted aryl group, an aryl group substituted with one or more C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy groups, an aralkyl group having 7 or 8 carbon atoms, or ##STR2## where x is an integer from 0 to 4 inclusive and R' is C.sub.1 -C.sub.4 alkyl, which are useful as stabilizers for synthetic polymers are disclosed. Also disclosed are compositions stable to photo-deterioration comprising said polyalkylated 4-aminopiperidine derivatives and a synthetic polymer.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: February 23, 1982
    Assignee: Carstab Corporation
    Inventors: Kenneth R. Molt, Mary J. Zestermann
  • Substituted oxazolines as stabilizers
    Patent number: 4288361
    Abstract: Oxazolines having at least one 3,5-dialkyl-4-hydroxyphenyl alkanoie acid ester substituent are provided. Such oxazolines are found to be useful as antioxidants in organic substances normally susceptible to oxidative deterioration.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: September 8, 1981
    Assignee: Carstab Corporation
    Inventors: Mary J. Zestermann, John F. Hussar
  • Ester substituted oxazolines
    Patent number: 4205176
    Abstract: Oxazolines having at least one 3,5-dialkyl-4-hydroxypheny l alkanoic acid ester substituent are provided. Such oxazolines are found to be useful an antioxidants in organic substances normally susceptible to oxidative deterioration.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: May 27, 1980
    Assignee: Cincinnati Milacron Chemicals Inc.
    Inventors: Mary J. Zestermann, John F. Hussar