Degradable smoking article
CA 2191025 C · Owner: Oglesby, Robert Leslie · Inventors: Ashcraft, Charles Ray; Oglesby, Robert Leslie; Dube, Michael Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A degradable smoking article comprises a tobacco rod and a filter component made of a gathered web of moisture disintegrative sheet material wrapped with a moisture disintegrative plug wrap bonded along a longitudinal seam with a water soluble adhesive. A moisture disintegrative tipping paper coated on one side with a water soluble adhesive secures the tobacco rod and filter component together. The combination of moisture and other natural elements such as sunlight mechanical, abrasion, etc. dissociates the components of the smoking article over a relatively short period of time. Other embodiments of the filter component include a hollowdegradable tube and a monolithic extruded starch …
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 November 22, 1996 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2018.
- 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.