Barrier coatings
CA 2443972 A1 · Owner: Maxwell, Jeffrey W. · Inventors: Maxwell, Jeffrey W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of preventing a material from adhering to a surface. In a preferred embodiment, the material comprises weld spatter and the surface is located near a welding operation. The method comprises coating the surface with a slurry comprising a mineral material in water. The slurry contains from 10% to 70% solids by weight and not more than 5% by weight of a material that decomposes when heated to 1000~F for one minute. The slurry is allowed to dry to form a barrier coating before the material contacts the surface.
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 March 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2024.
- 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.