Patent No. EP2536724 (titled "Process For Preparing Entecavir And Its Intermediates") was filed by Scinopharm Taiwan on Feb 16, 2011. The application was issued on Oct 23, 2019.

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 |
|---|---|---|
| GEORG KALHAMMER/STEPHAN TEIPEL | Aug 23, 2017 | BEST |
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
Sep 26, 2019
Sep 26, 2019
Sep 20, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Sep 12, 2019
Jul 30, 2019
Jul 30, 2019
Jul 22, 2019
May 7, 2019
May 7, 2019
Apr 23, 2019
Apr 2, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Mar 25, 2019
Feb 4, 2019
Dec 18, 2018
Dec 12, 2018
Dec 12, 2018
Dec 12, 2018
Dec 7, 2018
Nov 29, 2018
Nov 29, 2018
Nov 29, 2018
Nov 26, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Jul 6, 2018
Jul 6, 2018
Jun 5, 2018
Jun 4, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 29, 2018
Feb 6, 2018
Jan 31, 2018
Jan 31, 2018
Jan 31, 2018
Jan 31, 2018
Jan 31, 2018
Sep 29, 2017
Sep 29, 2017
Sep 6, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Aug 23, 2017
Nov 23, 2016
Oct 27, 2016
Oct 13, 2016
Oct 13, 2016
Oct 13, 2016
Oct 13, 2016
Oct 13, 2016
Jul 29, 2016
Jul 29, 2016
Jul 29, 2016
Jul 29, 2016
Jul 29, 2016
Apr 5, 2016
Apr 5, 2016
Apr 5, 2016
Apr 5, 2016
Apr 5, 2016
Jan 5, 2016
Jan 5, 2016
Mar 5, 2015
Mar 5, 2015
Mar 5, 2015
Mar 5, 2015
Mar 5, 2015
Jan 16, 2015
Dec 11, 2014
Dec 11, 2014
Dec 11, 2014
Oct 27, 2014
Oct 27, 2014
Oct 27, 2014
Oct 27, 2014
Oct 27, 2014
Sep 12, 2014
Sep 8, 2014
Mar 25, 2014
Mar 25, 2014
Mar 24, 2014
Nov 12, 2013
Nov 12, 2013
Nov 12, 2013
Nov 12, 2013
Nov 12, 2013
Jun 25, 2013
Jun 6, 2013
Jun 6, 2013
Jun 6, 2013
Nov 28, 2012
Sep 25, 2012
Sep 21, 2012
Sep 21, 2012
Sep 5, 2012
Jun 29, 2012
Jun 22, 2012
Jun 22, 2012
Jun 22, 2012
Jun 22, 2012
Sep 14, 2011
Sep 14, 2011
Aug 25, 2011
Aug 25, 2011