3692683

Information

• Patent Grant
• 3692683

• References
• Source

• Patent Number

  3,692,683

• Date Filed

  Not available

• Date Issued

  Tuesday, September 19, 1972
  52 years ago

• CPC

  • G11B5/70689 - Magnetite
  • C01G49/08 - Ferroso-ferric oxide (Fe3O4)
  • G11B5/70642 - iron oxides
  • G11B5/70647 - with a skin
  • G11B5/70652 - gamma - Fe2 O3
  • G11B5/70668 - containing a dopant
  • G11B5/70673 - containing Co
  • C01P2002/52 - containing elements as dopants
  • C01P2004/62 - Submicrometer sized
  • C01P2006/42 - Magnetic properties
  • Y10S423/02 - Sulfuric acid

• US Classifications

  • 252 - Compositions
  • 423 - Chemistry of inorganic compounds
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER