Heterochemical Corporation v. United States Rubber Company

KILEY, Circuit Judge.

This is a patent infringement suit by Heterochemical Corporation, of Ohio, seeking an injunction and accounting against United States Rubber Company, of New Jersey. After Heterochemical filed notice of appeal from the district court’s judgment against it, the patent expired so that the issue concerns only the question of damages for past infringement. We affirm.

TeGrotenhuis Patent No. 2,457,095 is concerned with synthetic rubber. Heterochemieal, assignee of the patent, has no manufacturing plant and depends for revenue upon licensing of its patents. TeGrotenhuis, assignor…