Expired Canadian patentCanada
Method of forming a spacer used to space end to end piping
CA 2101906 C · Owner: Lycan, Goodwin A. · Inventors: Lycan, Goodwin A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming undulate protrusions on a split ring with the ring placed in a die to first form a center protrusion and then to form the other protrusions located between the first formed protrusion and the ring ends.
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 August 4, 1993 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 4, 1993
GrantedJanuary 14, 2003
Term endedAugust 4, 2013
Patent numberCA 2101906 C
Classification (IPC)B21F37/02 +1 more
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.