Disposable paper ashtray
CA 2104700 A1 · Owner: Mou, Pai-Her · Inventors: Mou, Pai-Her
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable paper ashtray formed by folding a flat sheet of recycled paper made by compress process having four side, walls, a bottom and an upper holed flat portion extending from one of two opposite sides and folded to cover on an upper side and a separate bottom paper placed on an inner surface of the bottom and wetted with water for extinguishing burning or smoking cigarette butts. -7-
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 August 24, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2015.
- 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.