Suspended ceiling
CA 1234959 A · Owner: Hunter, Richard P. · Inventors: Hunter, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A joint between two members, one member carrying a web having two sides and a leading edge a projection, carried by the leading edge of the web a pair of notches, opening through both sides one through each side, and, spaced from the leading edge by a predetermined distance the other member comprising a web, a pair of flanges extending from one side of the web and spaced from one another by a distance at least equal to the width of the web of the first member, each of the flanges carrying a lip extending towards the other flange by a distance equal to the depth of the notch and defining a channel with the web opening towards the other flange of a width to permit the notch to receive the …
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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- 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.