Abrasive cleaning of fluid delivery systems
CA 2262372 A1 · Owner: Warren, Jonathan N. · Inventors: Deneau, Robert N.; Warren, Jonathan N.; Roelofs, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of cleaning interior surfaces of fluid delivery systems. The method comprises (a) passing through the system an abrasive cleaner composition comprising at least one liquid carrier containing solubilizable abrasive particles, at least some of which are in non-solubilized form effective to , abrade the material to be removed from the interior surfaces and (b) rinsing , the system with at least one fluid effective to (i) displace the carrier and (ii) remove the abrasive particles, at least partially by such chemical means as dissolution or decomposition or neutralization. Optionally the method can , include a first step of contacting the inside surfaces of the fluid delivery …
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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
- Filed July 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2019.
- 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.