Jackson Walker Obtains Judgment Invalidating Design Patent

March 3, 2016 | Client Results



Jackson Walker successfully represented its client, Summit Energy Services, in obtaining a judgment of invalidity against design patent D664,568, which was asserted by Top-Co Inc. Following a claim construction hearing in which inventor testimony and descriptions of the design features in Top-Co’s own marketing literature were presented, the Court found that the claimed casing centralizer design had no ornamental features.

In a separately filed lawsuit, Jackson Walker previously invalidated utility patent 6,435,275 in related litigation brought by Top-Co and Downhole Products.

Jackson Walker attorneys Chris Rourk, John Jackson, Sara Chelette, John Edwards and Amanda Zimmerman represented Summit Energy Services.


In This Story

John K. Edwards
Partner, Houston

John M. Jackson
Partner, Dallas

Christopher J. Rourk
Partner, Dallas

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