Patent No. EP2164904 (titled "Polyetherimide/Polyphenylene Ether Sulfone Blends") was filed by Sabic on Jul 8, 2008. The application was issued on Mar 30, 2016.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| SOLVAY SPECIALTY POLYMERS USA | Dec 19, 2016 | BENVENUTI |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
Jan 7, 2019
Jan 7, 2019
Jan 2, 2019
Oct 15, 2018
Oct 8, 2018
Oct 1, 2018
Oct 1, 2018
Sep 25, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 13, 2018
Sep 13, 2018
Sep 6, 2018
Sep 3, 2018
Aug 28, 2018
Aug 28, 2018
Aug 28, 2018
Aug 28, 2018
Jul 31, 2018
Jul 31, 2018
Jul 18, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
Jul 11, 2018
May 4, 2018
Apr 27, 2018
Apr 27, 2018
Apr 27, 2018
Jan 11, 2018
Nov 28, 2017
Nov 22, 2017
Nov 22, 2017
Nov 22, 2017
Nov 8, 2017
Nov 6, 2017
Oct 31, 2017
Oct 31, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Sep 7, 2017
Sep 1, 2017
Sep 1, 2017
Sep 1, 2017
Jun 20, 2017
Jun 13, 2017
Jun 13, 2017
Jun 13, 2017
Jun 13, 2017
Jun 13, 2017
Jun 13, 2017
Jun 13, 2017
Mar 29, 2017
Mar 24, 2017
Mar 24, 2017
Mar 24, 2017
Mar 24, 2017
Feb 3, 2017
Feb 3, 2017
Dec 23, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Dec 19, 2016
Mar 30, 2016
Mar 3, 2016
Feb 3, 2016
Feb 3, 2016
Feb 3, 2016
Feb 3, 2016
Feb 3, 2016
Nov 12, 2015
Nov 4, 2015
Oct 19, 2015
Oct 19, 2015
Oct 19, 2015
Oct 19, 2015
Jan 22, 2015
Jan 16, 2015
Jan 16, 2015
Jul 2, 2014
Jul 2, 2014
Jul 2, 2014
Feb 20, 2014
Feb 20, 2014
Sep 5, 2013
Sep 5, 2013
May 30, 2012
May 30, 2012
May 30, 2012
May 30, 2012
May 30, 2012
Apr 4, 2012
Mar 30, 2012
Mar 30, 2012
Mar 30, 2012
Nov 22, 2011
Nov 22, 2011
Nov 3, 2011
Nov 3, 2011
Apr 23, 2010
Apr 23, 2010
Apr 15, 2010
Apr 6, 2010
Feb 24, 2010
Feb 22, 2010
Jan 28, 2010
Nov 20, 2009
Nov 19, 2009
Nov 19, 2009
Nov 19, 2009
Feb 5, 2009
Feb 5, 2009
Jan 15, 2009
Jan 15, 2009
Nov 5, 2008
Nov 5, 2008
Nov 5, 2008