An incontestable trademark denies adverse litigants the ability to challenge your trademark registration.
Previously stated, an incontestable trademark denies adverse litigants the ability to challenge your trademark registration. For example, even a prior unregistered user of the trademark is blocked from canceling your trademark registration when it is deemed incontestable.
Additional protection for your trademark and brand.
Think of incontestable status as an added layer of insurance for your trademark and brand. In the long run, it could save you thousands of dollars in litigation fees and protect you from messy trademark disputes.
Conclusive evidence of the trademark owner’s rights.
Incontestable trademark status is conclusive proof that your trademark is valid, registered, and that it has obtained exclusive rights to use the mark with the registered goods and services.
Once accepted as incontestable, adverse parties can challenge the trademark only in very limited circumstances.
The only grounds to challenge an incontestable trademark are genericness and abandonment.
If you have not yet filed for incontestable status but are approaching your 5 year mark, see below for the requirements for filing a Section 15 Declaration. Or, visit my article Maintain Your Trademark Registration for a timeline of important filings. For more information visit the USPTO article Registration Maintenance/Renewal/Correction Forms.