Base plate, in particular for preparation of concrete products
CA 2052172 A1 · Owner: Bechtold, Heinz · Inventors: Bechtold, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Based plates made essentially of contaminated plastic wastes may be used to replace base plates made of soft woods or tropical hard woods, such as used in the concrete industry to produce composite blocks, plates, blocks curbstones or the, like. The base plates may be made by plasticizing and extruding the thermoplastic containing plastic component.
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 September 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2013.
- 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.