International Minerals & Chemical Corp. v. Watson

PINE, Chief Judge.

Plaintiffs seek a judgment against the Commissioner of Patents authorizing him to grant a reissue patent on an application containing two claims, namely claims 15 and 16. Claim 16 is controlled by a decision on claim 15 and claim 15 need only be considered.

Claim 15 is for a process for the production of “magnesium sulfate from langbeinite”. The process reacts lang-beinite with water or an unsaturated aqueous solution of magnesium sulfate substantially free from anions other than sulfate. The langbeinite and the aqueous material are employed in proportions which will produce…