Sloan Filter Co. v. Portland Gold Min. Co.
Court of Appeals for the Eighth Circuit
Appeal from the Circuit Court of the United States for the District of Colorado. This is an appeal from a decree dismissing the bill of complaint in a suit to restrain the infringement of a patent. The appellant, the Sloan Filter Company, sued as the successor in title to Edward D. Sloan, patentee in letters patent No. 587,874, issued August 10, 1897, for improvements in barrel filters for use in the filtration of precious metal solutions, as in the chlorination process.
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Appeal from the Circuit Court of the United States for the District of Colorado. This is an appeal from a decree dismissing the bill of complaint in a suit to restrain the infringement of a patent. The appellant, the Sloan Filter Company, sued as the successor in title to Edward D. Sloan, patentee in letters patent No. 587,874, issued August 10, 1897, for improvements in barrel filters for use in the filtration of precious metal solutions, as in the chlorination process. The claims of the patent are: “(1) In a barrel filter, the combination with a suitable barrel or cylinder, of a flat…
1Opinion of the CourtHook, Circuit Judge
The result of the application of the common skill and experience of a mechanic, which comes from the habitual and intelligent practice of his calling, to the correction of some slight defect in a machine or combination, or to a new arrangement or grouping of its parts, tending to make it more effective for the accomplishment of the obj ect for which it was designed, not involving a substantial discovery, nor constituting an addition to our knowledge of the art, is not within the protection of the patent laws. Gates Iron Works v. Fraser, 153 U. S. 332, 14 Sup. Ct. 883, 38 L. Ed. 734; Florsheim…
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- B. F. Goodrich Rubber Co. v. Gates Rubber Co.Court of Appeals for the Tenth Circuit · 1931
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