How long after you close a retail store should you keep liability insurance?
Since we assume you already have liability insurance, that will cover all occurrences while that policy is in force. You will need a claims made 'tail' policy to cover you for products liability for the longest period of the statute of limitations of any state your product is sold in. You may want to talk to your attorney about what type of business legal entity yours was, and if any personal exposure succeeds the business. If not, you may have no personal exposure and no need for insurance.
if your current policy is a claims made form then you need to buy tail covergae owever, if it is an occurance form...you have portection under that policy for ever for any events that transpired with-in the policy term.