Paper leaf cutting instrument
CA 2021008 C · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Kai, Hisao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paper leaf cutting instrument is disclosed which comprises a barrel portion accommodating a liquid supply portion for supplying a liquid for wetting a paper surface, a wetting end portion mounted on a tip end of said barrel portion and being supplied with the liquid from the liquid supplying portion, the wetting end portion having wettability and compressibility and a paper leaf, expanding/opening portion having an expanding/opening blade provided in contact with a side surface of the wetting end portion. A tip end of the expanding/opening blade extends substantially in the same length as the wetting end portion in an axial direction of the barrel portion.
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 July 12, 1990 and granted November 19, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2012.
- 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.