We are using Tuxedo 9.1 and have not installed any patches for a couple of years.
We will consider migrating to newer version when our version (9.1) run out of support (ie June 2014).
Is there any patch available for version 9.1? If it is, then could you please let me know the download link
You should be able to either get them or request them through Oracle Customer Support. Tuxedo 9.1 has been patched many times and support should be able to provide you with the latest rolling patch if you are covered under a support contract.
Oracle Tuxedo Chief Architect
Here is a document describing how you can download Tuxed rolling patches yourself from "My Oracle Support" portal:
"Tuxedo Patches Can Now Be Directly Downloaded Without Having To Open A Service Request (Doc ID 1075805.1)"