Window frames
CA 1160511 A · Owner: L.B. Plastics Limited · Inventors: Litchfield, Leon G.; Hardy, Terence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A window frame comprises a plurality of hollow elongated extruded plastics frame members connected to one another at right angles by plastics junction pieces each junc-, tion piece having a body portion and spigots projecting from the body portion at right angles to one another so as to be a tight push fit in the open ends of the frame members internal, tie members passing longitudinally through the frame members and through the junction pieces to increase the rigidity of the assembled structure.
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 January 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.