McGARRAGHY, District Judge.
This is a complaint to secure issuance of letters patent based upon a claim of invention relating to process and apparatus for the production of carbon black. Plaintiffs contend that they have a new method which is characterized by the use of raw materials which were not previously used for that purpose.
The Patent Office in denying the application relied upon prior art and among other references, cited Frost 1,438,032, December...
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