Electric hair dryer temperature limiter
CA 1055092 A · Owner: General Electric Company · Inventors: Nopanen, Esko J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a hair dryer of the type having a motor-driven fan, a heater box with plural wattage heaters connected in the box and disposed at the fan exit for heating the air to selected temperatures after it leaves the fan and having thermostat means to sense the air temperature and open the heater circuit on an overtemperature condition an improvement, is provided that comprises thermostat means disposed directly, in the exit plane of the heater box and also disposed downstream of all the plural wattage heaters with the thermostat means being connected in series with at least some of the heaters. This rapidly senses the outlet temperature from the heater box and disconnects its connected heaters. …
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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 May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.