Vehicle heating system with an engine-independent heater
CA 2019322 C · Owner: Humburg, Michael Herr · Inventors: Humburg, Michael Herr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle heating system with an engine-independent heater (2) and a heat carrier circuit (14). A feed line (24) leads from the internal combustion engine (8) driving the vehicle to the heater (2) and from there to a heating heat exchanger (10). A return line (30) leads from the heating heat exchanger (10) to the internal combustion engine (8), and a control device (6) for the heater (2). The heat carrier circuit (14) has a connection line (36) leading from the return line (30) to the feed line (24) in front of the heater (2), so that a short circuit excluding the internal combustion engine (8) is formed. The switching over from the short circuit to full heat carrier circuit is performed by …
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 June 19, 1990 and granted October 12, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 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.