Assembly of mouthpiece, stopper and lock for shutting off a pipe mouth
CA 2108787 A1 · Owner: Hagenberg, Hendrikus · Inventors: Hagenberg, Hendrikus; Hagenberg, Ferdinand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Assembly for shutting off a pipe mouth comprising: a mouthpiece , (10) which is open at both ends for connection to the pipe, mouth; a stopper (14) for shutting off one end of the mouthpiece (10) which stopper has an axially projecting part (16) which is intended for insertion into the mouthpiece (10); and a lock (20) which is placed by a key (22) in a locked and a released position in , the locked position the stopper (14) on the mouthpiece (10) being securely connected to the mouthpiece and the key being freely movable into and out of the lock, and in the released position the stopper (14) being freely movable relative to the mouthpiece (10) and the key being securely connected to the …
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 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 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.