Patents by Inventor Roberto Ortica

Roberto Ortica 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).

  • Poly 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylesters useful as thermal stabilizers for synthetic polymers
    Patent number: 4908398
    Abstract: Poly-dihydro-2,6-dimethylpyridine-3,5-dicarboxylesters of general formula (I) ##STR1## in which A, B, m, n, k, j, R, R.sup.1 and R.sup.2 have the meanings defined in the text, useful as thermal stabilizers for synthetic polymers, in particular for polyvinylchloride-based masses.The compounds of formula (I) are preferably used in combination with the usual stabilizers based on organic metal derivatives. They can also be used combined with agents which exert a synergic action in maintaining a low color of manufactured articles subjected to heating, and in particular with betadicarbonyl compounds of formula (II):R.sup.3 --CO--CH.sub.2 --CO--R.sup.4 (II)in which R.sup.3 and R.sup.4 have the meanings defined in the text, in masses containing organic calcium and zinc salts as basic stabilizers.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: March 13, 1990
    Assignee: Lagor S.p.A.
    Inventors: Giuseppe Li Bassi, Roberto Ortica
  • Aspartame synthesis
    Patent number: 4549987
    Abstract: A process for deformylation and separation of N-formyl-L- .alpha.-aspartyl-L-phenylalanine methyl ester from a mixture containing both .alpha. and .beta. isomers thereof, which comprises admixing with said isomeric mixture hydrogen peroxide and an organic acid.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: October 29, 1985
    Assignee: Farmitalia Carlo Erba S.p.A.
    Inventors: Franco Dallatomasina, Roberto Ortica, Pietro Giardino, Ernesto Oppici