Patents by Inventor Norberto Fossati

Norberto Fossati 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).

  • Piperidine derivatives and use thereof as stabilizers for polymers
    Patent number: 4530950
    Abstract: The invention relates to novel polyalkyl piperidine derivatives and use thereof as stabilizers for polymers.More particularly the invention relates to compounds having the general formula I ##STR1## where R denotes hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl or aryl; R.sub.1 and R'.sub.1 denote hydrogen, alkyl, alkenyl or aralkyl;R.sub.2 and R'.sub.2 denote hydrogen or methyl;X and X' denote oxygen or NR.sub.3 ;R.sub.3 denotes hydrogen, alkyl, cycloalkyl or aralkyl;A and A' denote (CH.sub.2).sub.m X";m equals 2 or 3;X" has the same meaning as X and X', and n can be 0 or 1.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: July 23, 1985
    Assignee: APITAL Produzioni Industriali S.p.A.
    Inventors: Guiseppe Raspanti, Norberto Fossati, Attilio Ferrari
  • Polypiperidinyl stabilizing agents for polymer materials
    Patent number: 4477615
    Abstract: The invention relates to novel polypiperidine compounds which give polymer materials high stability against oxidation and degradation when exposed to light, and to the process for the production thereof.
    Type: Grant
    Filed: April 8, 1983
    Date of Patent: October 16, 1984
    Assignee: Apital Produzioni Industriali S.p.A.
    Inventors: Giuseppe Raspanti, Norberto Fossati