Double walled tube with leak display device
CA 2360498 A1 · Owner: Phoenix Aktiengesellschaft · Inventors: Friederich, Hans-Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a tube arrangement comprising at least the following , components: a flexible double casing tube with an inner tube (1) and an outer , tube (2) forming a ring gap (3) which opens out into a widened cavity (43) in the vicinity of their ends; a connector (4) arranged at each end of the , double casing tube comprising a flange (42) and a fitting which in the , vicinity of the end of the outer tube (2) and of the cavity (43) has a first , annular ring (6) and in the vicinity of the end of the inner tube (1) a , second annular ring (5), a dividing chamber (10) between the flange (42) and , the first annular ring (6) which is surrounded by a chamber enclosure (11) said …
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 October 24, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2022.
- 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.