Mineral Oils: Apparatus Patents (Class 196)
- Systems (Class 196/105)
- Tube and drum (Class 196/107)
- Tubular (Class 196/110)
- With partitions (Class 196/111)
- Rotary (Class 196/112)
- Vacuum (Class 196/114)
- Special shapes (Class 196/115)
- Furnaces and flues (Class 196/116)
- Liquid baths (Class 196/118)
- Jackets (Class 196/119)
- Special means for heating (Class 196/120)
- Carbon removers (Class 196/122)
- Circulators or agitators (Class 196/123)
- Fluid injectors (Class 196/127)
- Films or sprays (Class 196/128)
- Depending legs or spur tubes (Class 196/129)
- Automatic control (Class 196/132)
- Special features of construction (Class 196/133)
- Heat recovery from vapor or residuum (Class 196/134)
- Feeders (Class 196/135)
- Vapor outlets (Class 196/136)
- Attachments (Class 196/137)
