Apply Patch 13 To 11.2.0.3 Database For Windows Server 2008 R2?

I want to apply patch 13 to 11.2.0.3 database for windows server 2008 R2. I saw the pre requisites and found that opatch should be 11.2.0.1.9 or later. My optach is 11.2.0.1.7. I downloaded the patch # 11846294 and unzipped under the opatch directory. In one of the step it asked me to run the following command

$ORACLE_HOME/OPatch/oplan/oplan generateApplySteps <bundle patch location>

but then it says oplan is not recognized. I have set the Oracle_home and path variable

my path is C:Oraclegrid_homein;C:Oracledbhome_1in;C:Oraclegridin;%SystemRoot%system32;%SystemRoot%;%SystemRoot%System32Wbem;%SYSTEMROOT%System32WindowsPowerShellv1.0;C:Program FilesArcGISArcSDEora11gexein;C:Program FilesXIVhost_attachin;C:Oracledbhome_1oplan

Note that my database version is 11.2.0.3 with ASM