2156903

Information

• Patent Grant
• 2156903

• References
• Source

• Patent Number

  2,156,903

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1939
  85 years ago

• CPC

  • G05B19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools
  • B01J13/0017 - by extraction of ions from aqueous solutions
  • B01J21/00 - Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
  • B01J21/02 - Boron or aluminium Oxides or hydroxides thereof
  • B01J21/04 - Alumina
  • B01J21/16 - Clays or other mineral silicates
  • B01J37/0236 - Drying
  • B23Q35/12 - involving electrical means
  • C10G35/06 - characterised by the catalyst used

• US Classifications

  • 502 - Catalyst, solid sorbent, or support therefor: product or process of making
  • 516 - Colloid systems and wetting agents