Close coupled contractible vent connector
CA 2201948 C · Owner: Andersen, John L. · Inventors: Andersen, John L.; Moss, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telescopically extensible-contractible air duct connector comprising an elongated outer duct element having an open end a closed end, and a lateral opening adjacent the closed end an inner duct element telescopically interfitting within the outer duct element having an open end within the outer duct element a closed end located. outside the outer duct element a lateral opening adjacent the closed end and a laterally projecting sleeve around the lateral opening the outer duct element having an elongated slot extending from the open end and of a width slightly greater than that of the laterally projecting sleeve of the inner duct element to receive the sleeve upon telescopic contraction 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 April 4, 1997 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2019.
- 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.