Patents by Inventor Franco Righi

Franco Righi 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).

  • Method for the production of alicyclic anhydrides
    Patent number: 3978120
    Abstract: A method is disclosed for the preparation of alicyclic anhydrides, useful intermediates in the preparation of alicyclic ketenes which can be converted into lactams. The instant method comprises heat-treating an alicyclic acid in a metallic reactor, free of nickel, under subatmospheric pressure. A catalyst, such as an alkyl ester of selenphosphoric acid, has given good results.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: August 31, 1976
    Assignee: Snia Viscosa Societa Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Giancarlo Sioli, Luigi Giuffre, Franco Righi, Giancarlo Matera