TUFFTRIDE
Filed: May 23, 1960
Treating Metals by a Process Using Molten Salts Containing Sodium Cyanide
Owned by: DURFERRIT GMBH
Serial Number: 72097670
MELONITE
Filed: April 12, 1976
LIQUID HEAT TREATING EQUIPMENT, AND RELATED CONTROL, PARTICULARLY FOR PROCESSES UTILIZING MOLTEN SALTS CONTAINING CAUSTIC…
Owned by: DURFERRIT GMBH
Serial Number: 73083471
MEL-1
Filed: May 23, 1979
Salts Containing Caustic Cyanate for Molten Salt Baths Used for Nitriding Ferrous Metal Pieces
Owned by: DURFERRIT GMBH
Serial Number: 73216726
DURBORID
Filed: January 5, 1996
boron-releasing chemicals for the heat treatment of metals to gain wear resistant surfaces for tools, agricultural implements…
Owned by: DURFERRIT GMBH
Serial Number: 75040586
QPQ
Metal processing; surface engineering or treatment of metals by nitrocarburizing, combinded with oxidation, mechanical processing…
Owned by: DURFERRIT GMBH
Serial Number: 77039286
