Smoker's accessory
CA 2121289 C · Owner: Snaidr, Stanislav M. · Inventors: Snaidr, Stanislav M.; Bowen, Larry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A smoker's accessory for filtering sidestream smoke emitted from a burning cigarette comprises an exhaust fan mounted in a central unit and a sidestream smoke filter cartridge having a cigarette tube for a burning cigarette is placed is provided alongside the central component. The filter cartridge is provided in a housing which is connected to the central fan support. The cigarette tube is as long as a cigarette and has a diameter of at least 1.5 times the diameter of the cigarette. A porous low pressure drop filter element is provided at the end of the cigarette tube for removing sidestream smoke. The housing has a front end wall in which the cigarette holder with the cigarette tobe …
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 14, 1994 and granted April 29, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 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.
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.