Insulated sectional door
CA 1237651 A · Owner: Harsco Corporation · Inventors: Downey, Robert C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A slat assembly for a door includes a steel slat for the outside of the door and an extrusion of polyvinylchloride ( PVC ) serving as an insulation cover. A cavity in between the slat and the insulation cover is filled with insulation, the insulation and insulation cover providing a thermal break between the outside steel slats and the inside. The insulation cover is uniquely shaped to maximize strength and to secure it indirectly by way of a steel clip to the steel slat such that stress is minimized by accomodating differing coefficients of thermal expansion.
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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 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.