Patents by Inventor Pier D. Mattioli

Pier D. Mattioli 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).

  • Stable aqueous suspensions of zeolite which can be easily pumped
    Patent number: 5312793
    Abstract: Stable aqueous suspensions of zeolite 4A which can be easily pumped, containing from 0.5 to 65% of zeolite and from 0.05 to 6 g (per 100 g of zeolite) of a suspending agent, composed of mixtures of ethoxylated alkanols, said mixtures being obtained by ethoxylating: a) biodegradable branched alkanols, having from 10 to 18 carbon atoms and having a single branching in position 2, said mixtures containing at least 2 alkanols having a different number of C atoms; or b) mixtures containing 40-100% of branched alkanols as in a) and 60-0% of linear alkanols having from 10 to 18 C atoms.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: May 17, 1994
    Assignee: Enichem Augusta Industriale S.r.l.
    Inventors: Paolo Colombo, Pier D. Mattioli, Luigi Valtorta, Pierino Radici
  • Stable aqueous suspensions of inorganic silica-based materials insoluble in water
    Patent number: 5190693
    Abstract: Aqueous suspensions of a silica-based inorganic material insoluble in water and in a finely subdivided form, stabilized with at least one organic polymeric compound containing hydroxylic groups and with an ammonium or phosphonium quaternary compound of the formula: ##STR1## wherein: B is nitrogen or phosphorus; A is either mono or polyvalent anion, while A.sub.1.sup.- is SO.sub.3.sup.- or COO.sup.-.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: March 2, 1993
    Assignee: Ausidet S.p.A.
    Inventors: Pier D. Mattioli, Angelo Tentorio, Claudio Troglia