Patents by Inventor Giuseppe Nelli

Giuseppe Nelli 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).

  • Polycondensates of substituted piperidines and use thereof as stabilizers for polymers
    Patent number: 4395508
    Abstract: New polycondensates of alkyl-substituted piperidines are disclosed. These new polycondensates are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new polycondensates is also disclosed, as well as the polymeric compositions stabilized with said new polycondensates.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: July 26, 1983
    Assignee: Montedison S.p.A.
    Inventors: Giuseppe Nelli, Roberto Oriani
  • N,N-Di-(hydroxy-phenyl) derivatives of piperazine and use thereof as stabilizers for polymers
    Patent number: 4373042
    Abstract: New N,N'-di-(hydroxy-phenyl) derivatives of piperazine are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the polymeric compositions stabilized with said new compounds.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: February 8, 1983
    Assignee: Montedison S.p.A.
    Inventors: Francesco Gratani, Giuseppe Nelli, Piero Di Battista, Osvaldo Cicchetti
  • Polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids and use thereof as stabilizers for polymers
    Patent number: 4361695
    Abstract: New polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids are disclosed.The new polyesters are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new polyesters is also disclosed, as well as the polymeric compositions stabilized with said new polyesters.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: November 30, 1982
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Giuseppe Nelli, Francesco Gratani
  • Piperidine phosphite stabilizers for polymers and polymers stabilized thereby
    Patent number: 4293466
    Abstract: New derivatives of N,N'-4-piperidyl-tetraalkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: December 5, 1978
    Date of Patent: October 6, 1981
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Renzo Fontanelli, Francesco Gratani, Giuseppe Nelli
  • Stabilizers for polymers and polymers stabilized thereby
    Patent number: 4210576
    Abstract: New derivatives of N,N'-4-piperidyl-tetralkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: July 1, 1980
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Renzo Fontanelli, Francesco Gratani, Giuseppe Nelli
  • Stabilized perfluoropolyether fluids
    Patent number: 4174461
    Abstract: Perfluoropolyether compounds and mixtures thereof having the formula:A--O--(C.sub.3 F.sub.6 O).sub.P --(CF.sub.2 O).sub.Q --(C.sub.2 F.sub.4 O).sub.R --CF(Z)--CO--N(R)Arwherein the perfluoroalkyleneoxy groups are randomly distributed and A is a perfluoroalkyl group or a --CF(Z)--CO--N(R)Ar group; P, Q and R are zero but not simultaneously or numbers from 1 to 100, the sum of P, Q and R being 3 to 200; Z is a fluorine atom or a CF.sub.3 group; Ar is an aryl group; and R is hydrogen, alkyl, alkyl-aryl or an aryl group.These compounds are excellent stabilizers for perfluoropolyether fluids of the formula:X--O--(C.sub.3 F.sub.6 O).sub.P --(CF.sub.2 O).sub.q --(C.sub.2 F.sub.4 O).sub.r --Ywherein p, q and r are each zero or numbers from 1 to 100, the sum of p, q and r being 6 to 200, and X and Y are the same or different and are perfluoroalkyl groups having 1 to 3 carbon atoms.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: November 13, 1979
    Assignee: Montecantini Edison S.p.A.
    Inventors: Dario Sianesi, Giuseppe Nelli, Renzo Fontanelli, Valentino Zamboni