Canadian application, no grantCanada
Seal receptacle using expandable liner hanger
CA 2471875 A1 · Owner: Waddell, Kevin Karl · Inventors: Bullock, Michael Dennis; Waddell, Kevin Karl; Jackson, Tance Alan
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The end of an expandable liner hanger (120) provides a receptacle for another tubular liner (135).
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 December 10, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 2002
GrantedNo grant recorded
Term endedDecember 10, 2022
Patent numberCA 2471875 A1
Classification (IPC)E21B23/00 +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.