Molten metal pump with filter
CA 2009656 C · Owner: Martin, Harvey · Inventors: Neff, David V.; Mordue, George S.; Amra, Lufti H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A molten metal pump (10) includes a filter (30) that prevents ingestion of foreign material such as dross from molten metal within which the pump (10) is immersed. The filter (30) is a large structure that is secured to the base of the pump (10) surrounding the pump's inlet. The filter (30) forms a cavity (36) adjacent the pump's inlet. The ratio of the surface area of the filter (30) to the inlet area of the pump (10) is very large: the filter (30) has a low porosity while maintaining a high flow rate for the pump (10).
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 February 9, 1990 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2012.
- 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.