Laser welded ceiling grid members
CA 1293099 C · Owner: National Rolling Mills Inc. · Inventors: Platt, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making an inverted T shaped ceiling grid member comprises the steps of folding a sheet of metal to form a vertical central web with a a bulb at the top and having two web sidewalls with a pair of oppositely disposed horizontal flanges extending outwardly from the bottom of the web for supporting ceiling tiles and, laser welding the two web sidewalls together by applying a laser beam thereto to form a laser weld to increase the strength and rigidity of the ceiling grid member. A cap may be attached to the flanges to cover the bottom of the flanges. A metal inverted T shaped ceiling grid member comprises a vertical web having a bulb at the top and having two web sidewalls, a pair …
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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.