Expired Canadian patentCanada
Roll door
CA 1284094 C · Owner: Hy-Roll Manufacturing Inc. · Inventors: Ellis, Arthur Stanley
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 roll door assembly has a flexible roll door rollingly supported in a frame; a counterweight assembly employing fixed and movable pulleys and a counterweight retains the roll door taut.
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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 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.
FiledFebruary 12, 1987
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284094 C
Classification (IPC)E06B9/56
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.