Expired Canadian patentCanada
Treatment of coated glass
CA 1196234 A · Owner: Pilkington Brothers P.L.C. · Inventors: Lawrenson, Jack; Murphy, Kevin M.
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 metallic layer is removed from a coated glass surface (3) by subjecting the coated glass to the abrasive action of a stripping wheel (7) comprising a particulate abrasive in a porous matrix of polyvinyl formal.
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
- Granted November 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 30, 1983
GrantedNovember 5, 1985
Term endedNovember 5, 2002
Patent numberCA 1196234 A
Classification (IPC)C03C19/00 +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.