Quick acting test plug
CA 1310282 C · Owner: Lamoureux, George · Inventors: Lamoureux, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A quick acting test plug for sealing of the open end of a drillstem box includes a cap portion which has seals to engage the terminal end of the drillstem box and movable locking means to grip the inside threads of the drillstem box. Means are provided to move the segments into locking and unlocking positions inside the drillstem box and to force the cap down into a sealing position on the end of the drillstem box.
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
- Granted November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
- 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.