J&J Unit In Hot Seat Over Pfizer ThermaCare IP

Law360, New York (March 6, 2012, 6:44 PM EST) -- Pfizer Inc. on Monday lobbed a patent infringement lawsuit against a Johnson & Johnson unit in Delaware federal court, claiming its Tylenol-branded heat patches use heat cells that violate Pfizer’s patent technology.

Pfizer filed the suit on behalf of itself and Wyeth LLC, asserting that McNeil-PPC LLC’s line of Tylenol Precise Pain Relieving Heat Patches willfully infringe on U.S. Patent Number 5,918,590, titled "Heat Cells."

The patent covers certain heat cells of a particular exothermic composition, size and shape, according to the complaint. When these cells...
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