Patents by Inventor Hans-Juergen EHRET

Hans-Juergen EHRET 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).

  • Acylation process
    Patent number: 10889654
    Abstract: The invention concerns a process for the manufacture of an acylated polysaccharide which comprises. (a) reacting a polysaccharide with an acylating agent to produce an acylated polysaccharide and (b) washing the acylated polysaccharide with water containing from 0.05 to 15 mg/l Ca2+-ions (c) recovering the washed acylated polysaccharide and an aqueous phase containing carboxylic acid from step (b).
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: January 12, 2021
    Assignee: SOLVAY ACETOW GmbH
    Inventors: Andreas Hummel, Hans-Juergen Ehret
  • Acylation Process
    Publication number: 20160237172
    Abstract: The invention concerns a process for the manufacture of an acylated polysaccharide which comprises. (a) reacting a polysaccharide with an acylating agent to produce an acylated polysaccharide and (b) washing the acylated polysaccharide with water containing from 0.05 to 15 mg/l Ca2+-ions (c) recovering the washed acylated polysaccharide and an aqueous phase containing carboxylic acid from step (b).
    Type: Application
    Filed: October 8, 2014
    Publication date: August 18, 2016
    Applicant: SOLVAY ACETOW GmbH
    Inventors: Andreas HUMMEL, Hans-Juergen EHRET