Well-tubing expansion joint
CA 1159865 A · Owner: Dresser Industries, Inc. · Inventors: Weise, Stanley A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure An expansion joint for use with a retrievable packer includes a stop to limit the extent to which the joint may be extended and for providing vertical support for packer retrieval and further includes and interfitting key and slot acting between a housing and a mandrel telescoped into the housing in order to transmit torque through the joint.
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 January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- 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.