Patents by Inventor Marcello Mazzei

Marcello Mazzei 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).

  • Asymmetric hydrogenation of prochiral olefins by complexes of transition metals immobilized in clay-like minerals
    Patent number: 4328364
    Abstract: For the asymmetrical hydrogenation of prochiral olefins, a catalyst system is proposed which is a Rhodium cationic complex immobilized on a clay-like mineral such as hectorite, bentonite and haloysite.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: May 4, 1982
    Assignee: Snamprogetti, S.p.A.
    Inventors: Marcello Mazzei, Mario Riocci, Walter Marconi
  • Process for rendering polymers degradable and polymers obtained thereby
    Patent number: 4100334
    Abstract: Polymers of the type commonly used in packaging are rendered degradable through the action of sunlight by adding thereto up to 3% of an olefinically unsaturated compound containing at least two double bonds, such as 1,6-diphenylhexatriene.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: July 11, 1978
    Assignee: Snam Progetti S.p.A.
    Inventors: Nicola Palladino, Marcello Mazzei, Walter Marconi
  • Process of rendering polymeric material degradable under the direct action of sunlight by the addition of durene
    Patent number: 4000120
    Abstract: A plastic material such as a polyethylene which is adapted for use in packaging is rendered photodegradable under the direct action of sunlight by mixing therewith an amount, up to 3% by weight, of an additive consisting of 1.2.4.5 tetramethylbenzene.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: December 28, 1976
    Assignee: Snam Progetti S.p.A.
    Inventors: Nicola Palladino, Marcello Mazzei, Walter Marconi
  • Process for making degradable polymers and degradable polymers obtained thereby
    Patent number: 3983308
    Abstract: A novel process for making polymers degradable by the direct action of sunlight is disclosed. The process is based on the addition to the polymer of a compound having the formula: ##EQU1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are selected from the group consisting of aromatic radicals with the proviso that one or two of them may be selected from the group consisting of hydrogen, alkyl, cycloalkyl and arylalkyl.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: September 28, 1976
    Assignee: Snam Progetti S.p.A.
    Inventors: Nicola Palladino, Marcello Mazzei, Walter Marconi
  • Photodegradable copolymers of ethylene and vinyl alcohol containing ketoether groups
    Patent number: 3976621
    Abstract: A copolymer of ethylene and vinyl alcohol which contains ketoether groups and is photodegradable under the direct action of sunlight is prepared by reacting an ethylene-vinyl alcohol copolymer with alpha-diazoacetophenone in the presence of an organic solvent and a catalyst consisting of a Lewis acid.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: August 24, 1976
    Assignee: Snam Progetti S.p.A.
    Inventors: Nicola Palladino, Marcello Mazzei, Paolo Bacchin, Walter Marconi