Anti-wobbling bailer with high speed insertion
CA 2357100 A1 · Owner: Pratt, David W. · Inventors: Pratt, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bailer has two externally-mounted weights. The first weight is positioned at its uppermost end and the second weight is positioned at its lowermost end. The combination of weights increases the insertion rate of the bailer into a liquid so that the time elapsed for an insertion is reduced relative to the time required to insert unweighted bailers, top-weighted bailers, or bottom-weighted bailers. The weights also prevent wobble about the longitudinal axis of the bailer as it descends. In a second embodiment a, spacer member is secured to the leading end of the bailer to space the leading end away from a bottom of a well. In this way, sediment stirred up by the impact of the bailer against …
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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 September 6, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2023.
- 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.