Patents by Inventor Guido Giovannoni

Guido Giovannoni 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).

  • Process for the preparation of chitosan fibers
    Patent number: 4464321
    Abstract: Hollow chitosan fibres for use in ultrafiltration processes are described, and which can be plasticized by the addition of glycerin such that they contain this latter in a quantity variable between 0.5 and 5% by weight with respect to the polymer. Said fibres are prepared by the wet spinning of acid chitosan solutions, using an alkali solution as the external fibre coagulant and a gaseous phase containing a basic gaseous component as the internal fibre coagulant.
    Type: Grant
    Filed: October 7, 1982
    Date of Patent: August 7, 1984
    Assignee: Anic S.p.A.
    Inventors: Francesco Pittalis, Francesco Bartoli, Guido Giovannoni