Plastic gear pump housing
CA 2340548 A1 · Owner: Du, Benjamin R. · Inventors: Du, Benjamin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gear pump comprising a plastic gear pump housing having an interior surface. Rotatably attached to the gear pump housing is a drive gear and an idler gear. The idler gear, is cooperatively engaged to the drive gear such that rotation of the drive gear will rotate the, idler gear. The gear pump housing is formed from plastic such that the interior surface, thereof is sized to contact the drive gear and the idler gear. Accordingly the contact between, the idler gear and the drive gear with the interior of the plastic gear pump housing forms a, seal therebetween which is used for the pumping of fluid by the gear pump.
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 March 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.