Jones Day has helped client Stopaq BV revive a patent case over manhole cover sealant—that’s right, manhole cover sealant.

In a decision issued on Friday, the U.S. Court of Appeals for the Federal Circuit ruled that Stopaq should be allowed to go to trial on claims that rival Amcorr Products and Services Inc. infringed on its manhole cover sealant patents. The ruling reverses U.S. District Judge Lynn Hughes in Houston, who dismissed Stopaq’s patent infringement claims on summary judgment in January 2013.