Patent Yard Sign in
Expired Canadian patentCanada

Fire sensor statistical discriminator

CA 1269458 C · Owner: Santa Barbara Research Center · Inventors: Kern, Mark T.; Shamordola, Kenneth A.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

Circuitry for using the statistical properties of detected radiation in the time domain to discriminate between stimuli from fire and non-fire sources. Statistical discriminators for fire sensing may be combined with other types of sensors operating in the frequency domain for developing improved sensitivity with better security against false alarms.

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted May 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 11, 1986
GrantedMay 22, 1990
Term endedMay 22, 2007
Patent numberCA 1269458 C
Classification (IPC)G08B17/12

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedAug 11, 1986Patent grantedMay 22, 1990Term endedMay 22, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.