Trademark Overview
On Thursday, October 9, 1952, a trademark application was filed for SIGRI with the United States Patent and Trademark Office. The USPTO has given the SIGRI trademark a serial number of 71636439. The federal status of this trademark filing is EXPIRED as of Monday, November 27, 1995. This trademark is owned by SIEMENS-PLANIAWERKE AKTIENGESELLSCHAFT FUER KOHLEFABRIKATE. The SIGRI trademark is filed in the Environmental Control Instrument Products category with the following description:
PRODUCTS AND ARTICLES MADE OF CARBONACEOUS MATERIALS, ARTIFICIAL CARBON COMPRISING AMORPHOUS CARBON AND GRAPHITE-NAMELY, ELECTRODES COMPRISING CARBON AND GRAPHITE FOR ELECTRICALLY OPERATED FURNACES AND ELECTROLYTIC APPARATUS; HEATING RODS FOR ELECTRICAL RESISTANCE FURNACES; GRAPHITE ANODES FOR RECTIFIERS AND ELECTROLYTIC APPARATUS; AND GRAPHITE RODS AND GRAPHITE CONTACTS FOR ELECTRICAL RESISTANCE FURNACES