Telescoping device
CA 2118591 A1 · Owner: Fumex Ab · Inventors: Lundstrom, Barry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telescopic device which forms part of a suction line which in , turn, forms part of an extractor arrangement for extracting by suction waste gases or other environmentally harmful gases from at least one work place, wherein the suction line is connected to a central extractor plant or to a fan. The inventive telescopic device includes at least two tubes (3, 4) which are moveable axially in relation to one another, i.e. an outer tube (3) and an inner tube (4) which form the suction line (2) or a part thereof. The inner tube (4) which is moveable axially within the outer tube (3) is supported by a slide-bearing bushing (7) which is mounted at the outer end (6) of the outer tube and …
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 September 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2014.
- 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.