Patents by Inventor Riccardo Po'

Riccardo Po' 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).

  • Polyester compositions with a high crystallization rate
    Patent number: 5334343
    Abstract: Polyester compositions with a high crystallization rate obtained by mixing, at a high temperature, a polyester resin with at least one organic compound having the general formula:ROOC--Ar--OOC--Ar'--COO--Ar--COOR (I)where R represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical whereare Ar and Ar', either the same or different, represent a simple or condensed aromatic radical containing from 6 to 12 carbon atoms, and cooling the mixture thus obtained to room temperature.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: August 2, 1994
    Assignee: Enichem S.p.A.
    Inventors: Riccardo Po', Ernesto Occhiello, Giorgio Giannotta, Fabio Garbassi
  • Process for preparing high molecular weight polyethylene-terephthalate from recycled polyethyleneterephthalate
    Patent number: 5331065
    Abstract: Polyethyleneterephthalate (PET) originating from the sorted collection of solid urban refuse can be regraded and recycled as such or mixed with virgin PET if treated at high temperature with an oxazoline of general formula: ##STR1##
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: July 19, 1994
    Assignees: Eniricerche S.p.A., Enichem S.p.A.
    Inventors: Riccardo Po', Nicoletta Cardi, Luisa Fiocca, Antonio Gennaro, Giorgio Giannotta, Ernesto Occhiello
  • Polyesters showing a high crystallization rate and procedure for their preparation
    Patent number: 5278281
    Abstract: Polyesters with a high crystallization rate synthesized by the polycondensation of terephthalic acid with at least one C.sub.2 -C.sub.4 alkylenic glycol in the presence of 0.1-1.5 mol % of a copolymerizable reagent having the general formula:ROOC--Ar--OOC--Ar'--COO--Ar--COORwhere Ar and Ar'represent aromatic radicals and R represent a halogen, a hydrogen atom or a C.sub.1- C.sub.4 alkyl radical.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: January 11, 1994
    Assignee: Enichem S.P.A.
    Inventors: Riccardo Po, Ernesto Occhiello, Fabio Garbassi, Luigi Pelosini
  • Low-crystallization-speed polyesters, and process for their preparation
    Patent number: 5266676
    Abstract: Low-crystallization-speed polyesters obtained by means of the polycondensation of 2,6-naphthalene-dicarboxy acid with at least one (C.sub.2 -C.sub.10)-(cyclo)alkylene glycol in the presence of 0.5-50 mol % of a copolymerizable reactant of general formula:ROOC--Ar--OOC--Ar'--COO--Ar--COOR (I)wherein Ar and Ar' stand for aromatic radicals, and R stands for a hydrogen atom or a (C.sub.1 -C.sub.4)-alkyl radical, or the OR group is replaced by a halogen.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: November 30, 1993
    Assignee: Istituto Guido Donegani S.p.A.
    Inventors: Riccardo Po', Ernesto Occhiello, Fabio Garbassi, Luigi Pelosini
  • Polyesters with low crystallization speed and process for producing them
    Patent number: 5252282
    Abstract: Low-crystallization-speed polyesters obtained by means of the polycondensation of terephthalic acid with at least one (C.sub.2 -C.sub.10)-(Cyclo)alkylene glycol in the presence of 2-50 mol % of a copolymerizable reactant of general formula:ROOC-Ar-OOC-Ar'-COO-Ar-COOR (I)wherein Ar and Ar' stand for aromatic radicals, and R stands for a hydrogen atom or a (C.sub.1 -C.sub.4)-alkyl radical, or the OR group is replaced by a halogen.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: October 12, 1993
    Inventors: Riccardo Po', Ernesto Occhiello, Fabio Garbassi
  • Copolyesters having an improved combination of properties
    Patent number: 5213856
    Abstract: Copolyesters having an improved combination of barrier, mechanical, thermal and rheological properties and consisting of acylic and glycolic radicals, wherein the acylic radicals derive from at least isophthalic acid and 2,6-naphthalene dicarboxylic acid and at least 90% by mols of the glycolic radicals derive from ethylene glycol.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: May 25, 1993
    Assignee: Istituto Guido Donegani S.p.A.
    Inventors: Riccardo Po', Paolo Cioni, Ernesto Occhiello, Fabio Garbassi