This question should be technically answered by Oracle Support, but their response time is slow. Hence, I ask you is there a version guide that mentions which versions of Oracle Weblogic are EOL with their dates?
http://www.oracle.com/us/support/library/lifetime-support-middleware-069163.pdf here lists the information, but is confusing when it comes to precise information.
For example,
Oracle Application Grid Releases
Oracle WebLogic Server 10.3 * Aug 2008 Jan 2014 Jan 2017
Oracle WebLogic Server 11g R1(10.3.1 and higher)* Jun 2009-Nov 2009 Dec 2018 Dec 2021
Why does this have to be so confusing?
That document seems relatively clear.
After extended support expires, you will have access to sustaining support, which is basically "you can search the support database and download fixes that we already made" and not much more.