Wedgethread pipe connection
CA 2477335 A1 · Owner: Watts, John D. · Inventors: Watts, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A threaded pipe connection for assembly with the use of thread dope having a , box (2) and pin (1) formed with tapered mating wedgethreads the box threads , having crests (21), roots (8) stab flanks (4) and load flanks (6), the pin threads having crests (7), roots (20), stab flanks (3) and load flanks (5) an , included angle (35) measured in the gap between the flanks the threads having , a first axial crest width as at (17) and a second axial crest width as at (54), the first and second crest widths being positioned one thread turn apart, first crest width (17) being dimensioned with first radius (18) and second crest width (54) being dimensioned with second radius (55) a bridge , …
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 March 3, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2025.
- 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.