Patents by Inventor John J. Luzzi

John J. Luzzi 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).

  • Metal salts of hindered piperidine carboxylic acids and stabilized compositions
    Patent number: 3939163
    Abstract: Compounds having the formula ##EQU1## wherein R.sub.1 and R.sub.2 are lower alkyl or cycloalkyl,R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl,R.sub.4 is lower alkylene,M is a metal, andz has a value of from 1 to 4,And good light stabilizers. The carboxylic acids are prepared, for example, from 2,2,6,6-tetramethyl-piperidin-4-ol and succinic acid to give o-mono(2,2,6,6-tetramethyl-piperidin-4-ol)succinate. The metal salts of the acids are readily prepared by reacting the acids or their salts with a reactive form of the metal or metal complex.
    Type: Grant
    Filed: December 28, 1973
    Date of Patent: February 17, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi
  • Substituted piperazine dione oxyls and hydroxides and polymer compositions stabilized thereby
    Patent number: 3936456
    Abstract: Substituted piperazine dione oxyls and hydroxides are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds may be prepared by first preparing a substituted piperazine dione with subsequent oxidation of the piperazine dione to yield the oxyl and reduction of the oxyl to yield the hydroxide derivative. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15-n-octadecyl-7-oxyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
    Type: Grant
    Filed: July 16, 1973
    Date of Patent: February 3, 1976
    Assignee: Ciby-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi