CARBONITE
Filed: February 11, 1953
PULVERIZED FURFURAL RESIDUE BLENDED WITH CARBONACEOUS ADDITIVES
Owned by: HILL & GRIFFITH COMPANY, THE
Serial Number: 71642075
STABILITE
Filed: February 11, 1953
PULVERIZED FURFURAL RESIDUE USED IN THE MANUFACTURE OF STEEL CASTINGS
Owned by: HILL & GRIFFITH COMPANY, THE
Serial Number: 71642076
CHARBO
Filed: May 21, 1957
PULVERIZED FURFURAL RESIDUE BLENDED WITH CARBONACEOUS MATERIALS AND USED AS AN ADDITIVE FOR MOLDING SAND
Owned by: HILL & GRIFFITH COMPANY, THE
Serial Number: 72030430
ECONOCOAL
Filed: March 9, 1962
Carbonaceous Additive for Foundry Sand
Owned by: HILL & GRIFFITH COMPANY, THE
Serial Number: 72139492
DURA-COAL
Filed: April 2, 1962
Coal, Specifically a Carbonaceous Additive for Foundry Sand
Owned by: HILL & GRIFFITH COMPANY, THE
Serial Number: 72141304
