Patents by Inventor Bootsara Parchana

Bootsara Parchana 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).

  • Process for Producing Superabsorbents
    Publication number: 20210121852
    Abstract: The invention relates to a process for producing long-term color stable superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises at least 0.01% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof and at least 0.01% by weight of 2-hydroxy-2-sulfonatoacetic acid or a salt thereof.
    Type: Application
    Filed: April 9, 2019
    Publication date: April 29, 2021
    Inventors: Norbert Herfert, Bootsara Parchana, Sunantha Kaenthong, Stephan Bauer, Thomas Daniel, Katrin Baumann
  • Process for producing water absorbing polymer particles with improved color stability
    Patent number: 8703876
    Abstract: A process for producing water-absorbing polymer particles, wherein at least one inorganic phosphoric acid and/or salt thereof and at least one organic 2-hydroxy acid and/or salt thereof is added, where the phosphorus in the inorganic phosphoric acid has an oxidation number of less than +V and the organic 2-hydroxy acid does not have any ethylenically unsaturated groups, and also the water-absorbing polymer particles obtainable by the process according to the invention.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: April 22, 2014
    Assignee: BASF SE
    Inventors: Norbert Herfert, Thomas Daniel, Bootsara Parchana
  • Process for Producing Water Absorbing Polymer Particles with Improved Color stability
    Publication number: 20110224381
    Abstract: A process for producing water-absorbing polymer particles, wherein at least one inorganic phosphoric acid and/or salt thereof and at least one organic 2-hydroxy acid and/or salt thereof is added, where the phosphorus in the inorganic phosphoric acid has an oxidation number of less than +V and the organic 2-hydroxy acid does not have any ethylenically unsaturated groups, and also the water-absorbing polymer particles obtainable by the process according to the invention.
    Type: Application
    Filed: March 4, 2011
    Publication date: September 15, 2011
    Applicant: BASF SE
    Inventors: Norbert Herfert, Thomas Daniel, Bootsara Parchana