Expansible plug
CA 2185395 C · Owner: Fischerwerke Arthur Fischer Gmbh & Co. Kg · Inventors: Schaffer, Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an expansible plug consisting of an expansible sleeve (1) that has a plurality of longitudinal slots (4) that start from the front end (2) of the expansible sleeve (1) and extend along a portion of the length thereof, and of a threaded bolt (5) that has at its front end an expansion cone (6), it is proposed in order to, improve the compressible zone to form the latter by a, plurality of sickle-shaped cut-outs (10 11) that are, arranged spaced one from another circumferentially and axially, the ends (12) of the cut-outs pointing towards one another axially and overlapping one another circumferentially in meandering formation to form bending webs (13). Accordingly, on compression of 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 September 12, 1996 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 2018.
- 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.