Uninstalling a patch in Assure, Insight, Perceive and ER follows a same structure as applying the patch; however, the "apply" keyword is replaced with "revert" instead.
For example, if your patch was installed with the following syntax:
update-product.bat -c IA apply IP-9.2-331342-5 IA
Then uninstalling that patch would follow this syntax with "revert" instead of "apply":
update-product.bat -c IA revert IP-9.2-331342-5 IA