Patents by Inventor Onno Rienstra

Onno Rienstra 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: 20170130073
    Abstract: A composition comprising linked segments of: (a) a polyhydroxy segment derived from a compound independently selected an acyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups; a cyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups, a poly(hydroxyethyl) polyethyleneamine having 4 to 6 reactive hydroxyl groups and combinations thereof; (b) polyoxyalkylene segments wherein each hydroxyl group of the polyhydroxyl segment is linked to a polyoxyalkylene segment; (d) and aliphatic end segments or aromatic end segments, each end segment having 6 to 32 carbon atoms and a hydroxyl reactive group, wherein the mole ratio of the polyoxyalkylene segment to the polyhydroxy segment is at least 4:1 and the mole ratio of the aliphatic or aromatic end segment to the polyhydroxy segment is at least 0.25:1.
    Type: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Inventors: Eduardus Maria MANGNUS, Onno RIENSTRA, Stanley Leon FREEMAN, Alart MULDER, Kenneth F. SMITH
  • Patent number: 9550859
    Abstract: A composition comprising linked segments of: (a) a polyhydroxy segment derived from a compound independently selected an acyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups; a cyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups, a poly(hydroxyethyl) polyethyleneamine having 4 to 6 reactive hydroxyl groups and combinations thereof; (b) polyoxyalkylene segments wherein each hydroxyl group of the polyhydroxyl segment is linked to a polyoxyalkylene segment; (d) and aliphatic end segments or aromatic end segments, each end segment having 6 to 32 carbon atoms and a hydroxyl reactive group, wherein the mole ratio of the polyoxyalkylene segment to the polyhydroxy segment is at least 4:1 and the mole ratio of the aliphatic or aromatic end segment to the polyhydroxy segment is at least 0.25:1.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: January 24, 2017
    Assignee: Elementis Specialties, Inc.
    Inventors: Eduardus Maria Mangnus, Onno Rienstra, Stanley Leon Freeman, Alart Mulder, Kenneth F. Smith
  • Publication number: 20150065630
    Abstract: A composition comprising linked segments of: (a) a polyhydroxy segment derived from a compound independently selected an acyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups; a cyclic polyhydric alcohol having 4 to 6 carbon atoms and 4 to 6 reactive hydroxyl groups, a poly(hydroxyethyl) polyethyleneamine having 4 to 6 reactive hydroxyl groups and combinations thereof; (b) polyoxyalkylene segments wherein each hydroxyl group of the polyhydroxyl segment is linked to a polyoxyalkylene segment; (d) and aliphatic end segments or aromatic end segments, each end segment having 6 to 32 carbon atoms and a hydroxyl reactive group, wherein the mole ratio of the polyoxyalkylene segment to the polyhydroxy segment is at least 4:1 and the mole ratio of the aliphatic or aromatic end segment to the polyhydroxy segment is at least 0.25:1.
    Type: Application
    Filed: August 21, 2014
    Publication date: March 5, 2015
    Inventors: Eduardus Maria MANGNUS, Onno RIENSTRA, Stanley Leon FREEMAN, Alart MULDER, Kenneth F. SMITH
  • Publication number: 20150065629
    Abstract: An ICI viscosity regulating composition including linked segments of: (a) a polyhydroxy segment having 4 to 6 reactive hydroxyl groups; derived from a compound selected from: an acyclic or cyclic polyhydric alcohol having 4 to 6 carbon atoms, an alkoxylated acyclic polyhydric alcohol, an alkoxylated cyclic polyhydric alcohol and a poly(hydroxyethyl)polyethyleneamine; and combinations thereof; (b) aliphatic or aromatic linking segments, each linking segment having at least two linking groups independently selected from the group of: urethane, urea, ether, ester, amine, an aminoplast segment, a linking group which is the residue from reaction of an epihalohydrin and a hydroxyl group, and mixtures thereof; (c) polyoxyalkylene segments; (d) and aliphatic or aromatic end segments, each end segment having 6 to 22 carbon atoms and a linking group reactive moiety, wherein the mole ratio of the polyoxyalkylene segment to the polyhydroxy segment is at least 4:1 and the mole ratio of the aliphatic or aromatic end segmen
    Type: Application
    Filed: August 21, 2014
    Publication date: March 5, 2015
    Inventors: Stanley Leon FREEMAN, Eduardus Maria MANGNUS, Onno RIENSTRA, Mark Gregory MATYI, Nancy Pasquarello BUFORD, Kenneth F. SMITH
  • Publication number: 20010043913
    Abstract: The invention is directed to a novel in situ produced macroporous biomedical polyurethane-amide material based on chain extended isocyanate terminated polyester prepolymer units, wherein the said chain extension has been done with at least one dicarboxylic acid or a hydroxy-carboxylic acid.
    Type: Application
    Filed: April 2, 2001
    Publication date: November 22, 2001
    Applicant: Polyganics B.V.
    Inventors: Coenraad Jan Spaans, Vincent Willem Belgraver, Onno Rienstra, Jacqueline Hermina de Groot, Albert Johan Pennings