Submergible electric motor having internal corrosion protection
CA 2255149 A1 · Owner: Camco International Inc. · Inventors: Bruewer, Timothy B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A submergible electric motor has internal protection against corrosive fluids such as H2S, attacking its windings. The motor comprises a motor housing having a plurality of laminations stacked there within a drive shaft longitudinally extending through the motor housing, and a plurality of electrical windings extending through the lamination. The electrical windings are formed from magnet wire comprising an electrical conductor, a metallic coating surrounding the electrical conductor and a, polymeric insulation surrounding the metallic coating and the electrical conductor. The metallic coating acts as a fluid barrier to prevent corrosive fluids such as H2S, from, chemically attacking the …
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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 December 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2020.
- 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.