Vaporizer
CA 2174237 C · Owner: Kunze, Walter A. · Inventors: Kunze, Walter A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dispenser (10) having a housing (12) and at least one inlet vent and at least one outlet vent (14a-14e') about the housing. A cartridge (20) containing a vaporizable substance is located adjacent the inlet vent. A fan (16) pulls air in the inlet vent at least partially, across the cartridge upward through a portion of the housing and radially outward through the outlet vent. A rim (66) of the cartridge and a shelf (67a) inside the housing and adjacent the rim are adapted to form substantially a boundary between a lower (71) and a middle (69) compartment in the housing. The shelf and the rim cooperate to prevent air from circulating below the shelf and entering the lower compartment. At …
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 September 7, 1994 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.