3509063

Information

• Patent Grant
• 3509063

• References
• Source

• Patent Number

  3,509,063

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1970
  54 years ago

• CPC

  • G02B5/205 - Neutral density filters
  • B60R1/089 - using a liquid filtering layer of variable thickness
  • C08K3/04 - Carbon
  • Y10S359/90 - Methods

• US Classifications

  • 252 - Compositions
  • 106 - Compositions: coating or plastic
  • 359 - Optical: systems and elements
  • 524 - Synthetic resins or natural rubbers