Room air cleaner for a vehicle
CA 2014314 C · Owner: Hayashi, Nobuhiro · Inventors: Tanaka, Toshiichiro; Hayashi, Nobuhiro; Takashima, Yoshinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A room air cleaner for an automobile is disclosed. The room air cleaner comprises: a main power source switch through which the electric power is supplied from the battery of the automobile to the main unit of the air cleaner; a pulsation detection unit for detecting the operation of a generator of the automobile; and a control circuit for controlling the main power source switch in response to the output of the pulsation detection unit. The main power source switch is controlled to close when the operation of the generator is detected by the pulsation detection unit and to open when the operation of the generator is not detected by the pulsation detection unit.
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
- Filed April 10, 1990 and granted October 25, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2012.
- 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.