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Expired Canadian patentCanada

Thermostatic switch construction

CA 1267398 C · Owner: Therm-O-Disc, Incorporated · Inventors: Wells, Gordon K.

CIPO record

Overview

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

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Abstract From the Canadian patent

In a snap-acting thermostat with a snap disc a, stationary contact support carrying a stationary contact and a moveable contact support arm with a moveable contact on it a, bumper mounted for translation by the disc and operatively connecting the disc and the moveable contact and a case housing the snap disc, stationary contact, moveable contact and bumper interior side walls of the case have guide channels outboard of the stationary and moveable contacts. The bumper has a part substantially circular in section, extending within the compass of the guide means outboard of the contacts. The case has a closed top through which two contact terminals extend and an, open bottom through which the …

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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 April 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 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.
FiledNovember 27, 1987
GrantedApril 3, 1990
Term endedApril 3, 2007
Patent numberCA 1267398 C
Classification (IPC)H01H37/04 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedNov 27, 1987Patent grantedApril 3, 1990Term endedApril 3, 2007

Sources & verification

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