Patents by Inventor Gian Pietro Paganessi

Gian Pietro Paganessi 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 fertilizers and soil modifiers
    Patent number: 4058389
    Abstract: A soil modifying composition and a concentrated solution of ammonium sulphate with a high purity degree are obtained from by-products consisting essentially of ferrous sulphate heptahydrate, obtained in the production of titanium dioxide from ilmenites by the sulphate process, by contacting solid particles of said by-products with gaseous ammonia, lixiviating the resulting product with water, thereby to recover said concentrated solution of ammonium sulphate, the dried residual solid yielding said soil modifying composition.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: November 15, 1977
    Assignee: Societa' Italiana Resine S.I.R. S.p.A.
    Inventors: Luigi Piccolo, Marcello Ghirga, Antonio Paolinelli, Gian Pietro Paganessi