Production of sponge metal from sponge metal fines
CA 2029494 C · Owner: Westinghouse Electric Corporation · Inventors: Lopez, Dale Andrew; Abodishish, Hani Ahmed Mohamed; Wahlquist, Randy Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The pyrophorie fines inevitably resulting from the crushing of zirconium and/or hafnium or other exotic metal fines such as titanium and, uranium, ase brought into contact with molten magnesium or a molten mixture of magnesium and magnesium chloride in the usual vacuum distillation furnace so that their surfaces are wetted by the molten material, after which furnace temperature is dropped to solidify the molten material about the fines. Furnace temperature is then raised to that required to vaporize the magnesium and magnesium chloride whereupon sintering of the fines,takes place over a period of time.
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 November 16, 1990 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.