Expired Canadian patentCanada
Composite panel and method of making the same
CA 2236629 C · Owner: Wolff, Michael Helmut · Inventors: Wolff, Michael Helmut
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite panel includes fibres adhered together by means of an adhesive binder to form a sheet having opposed planar faces. Fibre reinforcement ribs are imbedded in the sheet.
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 4, 1998 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 4, 1998
GrantedJuly 22, 2003
Term endedMay 4, 2018
Patent numberCA 2236629 C
Classification (IPC)E04C2/16 +2 more
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.