Submersible pump assembly for use in a well
CA 2314873 A1 · Owner: Harte, Horst · Inventors: Hantschk, Gunther; Harte, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a submersible pump assembly which comprises a housing (12) filled with lubricating fluid. In said housing a first shaft (14, 102, 120) is mounted on bearings which has a first surface area (15) a first end , area (81) and an opposite second end area (134). In the housing (12) a second , shaft (16), which is in alignment with the first shaft (14 102, 120), is , mounted on bearings. The second shaft has a second surface area (17) a third , end area (132) facing the second end area (143) and an opposite fourth end area (163). In order to improve lubrication of the parts of the transmission which are susceptible to wear and to improve removal of the heat caused by …
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 October 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2021.
- 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.