Pipe connectors
CA 1233855 A · Owner: Hunting Oilfield Services (International) Limited · Inventors: Mcgugan, John D.; Lumsden, Norman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in and relating to Pipe Connectors A pipe connector comprises a tubular pin member having an outer generally frusto-conical peripheral surface provided with annular projections and a tubular, box member having an inner peripheral surface corresponding to the peripheral surface of the pin member which overlies, the peripheral surface of the pin member when the members are fully engaged together, and is provided with annular grooves in which the projections on the pin member are engaged. At the inner end of the peripheral surface of the pin member, the pin member is provided with an annular projection extending in the direction of the free end thereof, overlying the peripheral …
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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- 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.