Device in roll-up doors
CA 1297779 C · Owner: Nomafa Ab · Inventors: Nilsson, Ulf C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Reinforcement elements intended for use in door leaves of the kind consisting of fabric or similar flexible material. The reinforcement elements preferably are in the shape of tubes and have end pieces attached to their ends for cooperation with a profiled guiding member mounted in the door-frame of the door leaf in such a manner that when the door is being closed said reinforcement elements will be positioned at different predetermined levels of the door leaf thus strengthening the latter to prevent bulging of the door leaf when the latter is exposed to heavy winds. Fig. 1
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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.