Mica Insulator Co. v. Union Mica Co.

Citations

• 137 F. 928
• 1905 U.S. App. LEXIS 5017

Syllabus

<p>1. Patents—Infbingement—Micanite.</p> <p>The Dyer patent, No. 483,646, for a process of making artificial mica sheets for electrical insulation, called “micanite,” by uniting a series of layers of irregularly shaped mica scales, laid to overlap, by means of varnish, and under pressure, until a' sheet of the required thickness is formed, was not anticipated, and discloses patentable invention. Also' held infringed as to claims 1 and 2.</p> <p>2. Same—Validity—Defense of Prior Use.</p> <p>Evidence considered, and held insufficient to invalidate á patent on the ground of prior use.</p> <p>3. Same—Process of Molding Mica Sheets.</p> <p>The Jefferson patent, No. 4S3.653, claim 2, for a process of molding an artificial mica sheet, is void for anticipation, if construed as a continuation of the Dyer process of making such sheets, being covered by claim 2 of the Dyer patent. No. 483,646, and for lack of invention if otherwise construed.</p>