Compressible/expandable humidifier wick and method for manufacture
CA 2222992 C · Owner: Stanek, Terrence L. · Inventors: Stanek, Terrence L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new and improved humidifier wick and its method of manufacture are disclosed. The humidifier wick is made from a cellulose foam material that is compressed to a predetermined thickness in a dry condition. A series of air flow openings are formed in such material. As a result, the wick is capable of being expanded to a substantially increased thickness when wet in order to allow air to be drawn through the air flow openings for conveying moisturized air by a power driven fan blade from a humidifier into the atmosphere of a room. The air-flow openings are pre-configured in the humidifier wick when in its dry, condition, in order to allow air to pass into and beyond the air flow openings of …
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 December 18, 1997 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2019.
- 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.