Patents by Inventor Cristiana LICHERI

Cristiana LICHERI 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).

  • Publication number: 20190177892
    Abstract: The present invention relates to preparation of heterogeneous mixtures of (carboxylated) vinyl ester/ethylene dispersions, such as vinyl acetate/ethylene (VAE) dispersions with polyamideamine-epichlorohydrin (PAE) wet strength resins having a reduced amount of halogenated organic compounds, such as less than 1500 ppm. The dispersion offers extremely low free and bound formaldehyde levels combined with wet tensile strength for use in non-woven textile and paper applications.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 13, 2019
    Inventors: Cristiana LICHERI, John Alistair MCLENNAN, Ivan ROSSI, Alexander Paul SCOTT
  • Patent number: 9920483
    Abstract: The invention relates to copolymer dispersions, comprising: a copolymer of (a) a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms; (b) ethylene; (c) from 0.5 to 5 pphm of a first cross-linking co-monomer comprising an ethylenically unsaturated monomer comprising an epoxy group; and (d) from 0.55 to 2 pphm of a second functional co-monomer comprising an ethylenically unsaturated dicarboxylic acid, mono- or di-ester thereof or anhydride thereof wherein the copolymer is dispersed in an aqueous medium comprising a stabilizer. The dispersions advantageously provide surprisingly good adhesion characteristics to paper substrates.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: March 20, 2018
    Assignee: CELANESE SALES GERMANY GMBH
    Inventors: Yanzhong Pan, Cristiana Licheri, Nancy Coulson
  • Publication number: 20160153148
    Abstract: The invention relates to copolymer dispersions, comprising: a copolymer of (a) a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms; (b) ethylene; (c) from 0.5 to 5 pphm of a first cross-linking co-monomer comprising an ethylenically unsaturated monomer comprising an epoxy group; and (d) from 0.55 to 2 pphm of a second functional co-monomer comprising an ethylenically unsaturated dicarboxylic acid, mono- or di-ester thereof or anlaydride thereof wherein the copolymer is dispersed in an aqueous medium comprising a stabilizer. The dispersions advantageously provide surprisingly good adhesion characteristics to paper substrates.
    Type: Application
    Filed: June 12, 2014
    Publication date: June 2, 2016
    Inventors: Yanzhong PAN, Cristiana LICHERI, Nancy COULSON