Patents by Inventor Juergen Siebdrat

Juergen Siebdrat 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).

  • Patent number: 10435489
    Abstract: Ethylene-based polymer is made by a process comprising polymerizing a reaction mixture comprising ethylene and at least one chain transfer agent system; wherein the polymerization takes place in the presence of at least one free-radical initiator; and wherein the polymerization takes place in a reactor configuration comprising at least one tubular reactor with at least three reaction zones; and wherein at least two reaction zones receive an ethylene feed; and wherein the degree of polymerization in the first reaction zone is less than, or equal to, (5/LCBf)*3150; and wherein the ethylene-based polymer formed by the process comprises the following properties: (A) LCBf?(4.7+0.5*log(I2)); and (B) I2 from 0.2 to 25 dg/min.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: October 8, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Otto Berbee, Stefan Hinrichs, Nhi Dang, Juergen Siebdrat, Cornelis F. J. Den Doelder
  • Publication number: 20180265611
    Abstract: Ethylene-based polymer is made by a process comprising polymerizing a reaction mixture comprising ethylene and at least one chain transfer agent system; wherein the polymerization takes place in the presence of at least one free-radical initiator; and wherein the polymerization takes place in a reactor configuration comprising at least one tubular reactor with at least three reaction zones; and wherein at least two reaction zones receive an ethylene feed; and wherein the degree of polymerization in the first reaction zone is less than, or equal to, (5/LCBf)*3150; and wherein the ethylene-based polymer formed by the process comprises the following properties: (A) LCBf?(4.7+0.5*log(I2)); and (B) I2 from 0.2 to 25 dg/min.
    Type: Application
    Filed: September 20, 2016
    Publication date: September 20, 2018
    Inventors: Otto Berbee, Stefan Hinrichs, Nhi Dang, Juergen Siebdrat, Cornelis F.J. Den Doelder