|
US1707734A
|
|
Retort oven
|
|
US1527982A
|
|
Tunnel oven for burning ceramics and the like
|
|
US1743717A
|
|
Producer-gas process
|
|
US1631536A
|
|
Apparatus and process for burning ceramics and the like
|
|
US1674985A
|
|
Oven for burning refractories and the like
|
|
US1542065A
|
|
Coke-oven gas-main valve
|
|
US1678864A
|
|
Coke-oven-door-operating apparatus
|
|
US1733500A
|
|
Zinc-reduction apparatus and process
|
|
US1528555A
|
|
Oven for burning refractories and the like
|
|
US1663847A
|
|
Gas retort
|
|
US1715240A
|
|
Pitch-coking process
|
|
US1671195A
|
|
Retort oven
|
|
US1471401A
|
|
Process for desulphurizaton of iron and steel
|
|
US1725148A
|
|
Gas retort
|
|
US1541154A
|
|
Coke quenching and loading device
|
|
US1725149A
|
|
Gas retort
|
|
US1771048A
|
|
Process and apparatus for distillation of bituminous material
|
|
US1716643A
|
|
Gas retort
|
|
US1723280A
|
|
Coke and gas apparatus and process
|
|
US1653635A
|
|
Waste-heat boiler system
|
