Title: Memorial of the Lehigh Zinc Company in reference to a bill reviving the expired patent of Samuel T. Jones, upon petition of his administratrix, Martha M. Jones, passed by the House of Representatives
Description: "On July 23d, 1850, Samuel T. Jones obtained an English patent for improvement in method of making white oxide of zinc, which patent expired July 23d, 1864."
Subjects: Chemical processes, Patents, Patent extensions
Places: United States