Patents by Inventor Howard PROKOP

Howard PROKOP 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).

  • OPACIFIER CONCENTRATE AND ITS USE TO MODIFY THE APPEARANCE AND/OR INCREASE OPACITY AND/OR WHITENESS OF AN AQUEOUS COMPOSITION
    Publication number: 20220008303
    Abstract: The present invention relates to a sulfate-free aqueous concentrate comprising at least: (i) at least 25% by weight of opacifier particles selected from C16-C22 fatty acid, C16-C22 fatty alcohol, mono-, di- and tri-C16-C22 esters of glycerol, mono- and di-C16-C22 esters of ethylene glycol, diethylene glycol and triethylene glycol, C16-C22 fatty acid alkanolamides and mixtures thereof, with said particles are having a median diameter ranging from 1 to 15 ?m; (ii) an amphoteric or zwitterionic surfactant, (iii) water, with the total amount of surfactants in said aqueous concentrate ranging from 0.5 to 15% by weight, relative to the total weight of the aqueous concentrate. It also relates to the use of such an aqueous concentrate as an opacifier. The aqueous concentrate of the invention may be used as an opacifier in a composition, to replace at least some of a styrene opacifier or titanium dioxide in said composition.
    Type: Application
    Filed: November 20, 2019
    Publication date: January 13, 2022
    Inventors: Howard PROKOP, Céline ORIZET, Ali SAHOUANE, Hocine KABIR, Galder CRISTOBAL
  • Process for the preparation of (meth)acrylic esters and derivatives
    Patent number: 9145371
    Abstract: Transesterification processes for producing a compound of formula (I) wherein R1 is H or a methyl group, A and B are each, independently, a linear or branched C2-C5 alkylene group, comprising reacting: an acrylate or methacrylate of formula (II) wherein R1 is H or a methyl group and R2 is a C1-C4 alkyl group, with a compound of formula (III) wherein the reaction is performed: (i) in the presence of calcium oxide and calcium hydroxide, and (ii) wherein the molar ratio of the compounds of formula (II) to formula (III) is less than 4:1 or 3:1 respectively.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: September 29, 2015
    Assignee: RHODA OPERATIONS
    Inventors: Laurianne Timbart, Nemesio Martinez-Castro, James Woods, Howard Prokop, Rastko Vukov
  • PROCESS FOR THE PREPARATION OF (METH)ACRYLIC ESTERS AND DERIVATIVES
    Publication number: 20140364619
    Abstract: Transesterification processes for producing a compound of formula (I) wherein R1 is H or a methyl group, A and B are each, independently, a linear or branched C2-C5 alkylene group, comprising reacting: an acrylate or methacrylate of formula (II) wherein R1 is H or a methyl group and R2 is a C1-C4 alkyl group, with a compound of formula (III) wherein the reaction is performed: (i) in the presence of calcium oxide and calcium hydroxide, and (ii) wherein the molar ratio of the compounds of formula (II) to formula (III) is less than 4:1 or 3:1 respectively.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 11, 2014
    Inventors: Laurianne TIMBART, Nemesio MARTINEZ-CASTRO, James WOODS, Howard PROKOP, Rastko VUKOV