DUFFY, Senior Circuit Judge.
Plaintiff is the owner of Wallerstein U. S. Patent No. 2,531,999, issued November 28, 1950, based on an application filed October 13, 1947. The term of this patent expired on November 28, 1967. The patent is on a method of converting ordinary plant starch to crystalline dextrose. The process is generally characterized as an "enzyme hydrolysis" of starch. Plaintiff sued defendant for infringing this patent, and defendant filed a counter...
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