Door seal against sound in lift cages
CA 2023771 C · Owner: Inventio Ag · Inventors: Kappeler, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a device for a door seal against sound in lift cages 1 with automatic doors. These doors normally display small air gaps between door post and door leaf 3, abutment 1.2 and door leaf 3 inner door, leaf and outer door leaf in the case of telescopic doors and between door sill 5 and underside of the door leaf in order to avoid a contact between moved and fixed parts in the case of door movements. Vertical post seals 7 closing an air gap, abutment seals 10 sliding on the upper side of the door leaf 3, sills seal 6 in the door seal 5 and vertical door edge seals 3.1 at the front edges of the door leaves are present at the door leaves 3 for the sealing and covering of …
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
- Filed August 22, 1990 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2012.
- 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.