Clarissa L.Sullivan


Pittsburgh + 1.412.394.9595

Clarissa Sullivan focuses her practice on creating, maintaining, and enforcing intellectual property rights in the United States and internationally, primarily in the areas of trademarks and copyrights.

Clarissa manages global trademark portfolios and assists clients with maintaining trademark rights and meeting all continuing requirements following registration. She has also engaged in counseling clients on enforcing trademark rights and the proper use of social media content.

In addition to prosecuting trademark applications in the United States Patent and Trademark Office (USPTO) and abroad, Clarissa has assisted with proceedings before the Trademark Trial and Appeal Board (TTAB). Her responsibilities include drafting applications, responding to office actions, and drafting appeal briefs.

Clarissa is highly active in the Firm's pro bono practice. Her pro bono experience includes representing asylum seekers through Jones Day's Laredo Project, assisting pro se litigants in arbitration proceedings, and engaging with the Firm's Constitutional Policing and Civil Justice Reform project focused on protest activity and police reform. Clarissa is also conversational in American Sign Language (ASL).


  • Global systemically important bank (GSIB) conducts risk assessment to determine impact of LIBOR transition on enterprise-wide portfoliosJones Day is advising a GSIB with respect to enterprise-wide portfolios impacted by the LIBOR transition, including conducting portfolio-wide risk impact assessments, analyzing various consumer products, and developing litigation contingency plans.
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