Producing Or Purifying Free Metal Powder Or Producing Or Purifying Alloys In Powder Form (i.e., Named Or Of Size Up To 1,000 Microns In Its Largest Dimension) Patents (Class 75/343)
- Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (Class 75/364)
- Utilizing a fluidized bed (Class 75/366)
- Vaporizing or condensing free metal (Class 75/367)
- Settling of powder in molten metal or salt bath (Class 75/368)
- Purifying powdered metal or reducing powdered metal compound to free metal (Class 75/369)