Method of cutting high strength materials with water soluble abrasives
CA 2135565 A1 · Owner: Tisch, Brett L. · Inventors: Tisch, Brett L.; Bradley, Gary W.; Surjaatmadja, Jim B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of forming openings in structural substrates especi-, ally oil and gas well casings by providing a supply of a pre-, selected liquid and providing a supply of preselected abrasive particles which are soluble in the liquid. The liquid and abrasive particles are combined to form an abrasive particle laden saturated solution having a predetermined concentration ratio exceeding the saturation point of the base liquid. The abrasive particle laden saturated solution is then pressurized to a predetermined delivery pressure and is routed to at least one jetting nozzle capable of expelling the abrasive particle laden saturated solution. The substrate in which an opening, is to be formed, is …
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 November 10, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2016.
- 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.