Shields for protecting surfaces subject to frictional wear from such wear and clogging
CA 2100526 A1 · Owner: Medland, Thomas · Inventors: Medland, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A removable replaceable shield is provided to, protect surfaces of containers chutes and machinery, generally defined as vessels from the frictional effect, of contents moving against them. The shield is made from resilient sheet of polyethylene. Such shields may be provided, for example, the main chamber or in the material removal tube of a tower silo for grain or other granular material storage, for snow plows manure, spreaders, grain harvesters, storage containers and the like.
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 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.