3868484

Information

• Patent Grant
• 3868484

• References
• Source

• Patent Number

  3,868,484

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1975
  49 years ago

• CPC

  • H01M4/68 - for use in lead-acid accumulators
  • C22C11/02 - with an alkali or an alkaline earth metal as the next major constituent
  • H02H1/003 - Fault detection by injection of an auxiliary voltage
  • H02H1/0076 - by superposition on the watched current
  • H02H11/00 - Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
  • H02H11/005 - in case of too low isolation resistance, too high load, short-circuit; earth fault
  • H04B3/44 - Arrangements for feeding power to a repeater along the transmission line

• US Classifications

  • 340 - Communications: electrical
  • 379 - Telephonic communications