Honeycomb structural body
CA 2205682 C · Owner: Yamada, Toshio · Inventors: Hijakata, Toshihiko; Yamada, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A honeycomb structural body comprising a plurality of passages aligned in its axial direction which are defined by partition walls is disclosed. In the honeycomb structural body, a ratio of L/d is in a range of 0.4-1.3 where d is a diameter of an inscribed circle of the periphery of the honeycomb structural body on a plane perpendicular to its axial direction, and L is a length along the axial direction of the honeycomb structural body.
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 May 16, 1997 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 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.