F27B 5 - Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated

Patents for F27B 5 - Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (2,607)
03/1977
03/01/1977	US4009872 Energy-conserving, fast-cooling heat treating furnace
11/1976
11/30/1976	US3995101 Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
11/23/1976	US3993433 Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
09/1976
09/28/1976	US3982887 Flux-free soldering of aluminum-containing workpieces in a controlled atmosphere
09/14/1976	US3980028 Interchangeable see-through and opaque inserts for muffle furnace
08/1976
08/03/1976	US3972682 Pyrolysis furnace
06/1976
06/22/1976	US3964898 Process for batch production of sponge iron