Method of making copper infiltrated ferrous metal products
CA 2384221 A1 · Owner: Bequette, Todd A. · Inventors: Bequette, Todd A.; Clark, Teresa; Krave, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making a relatively small infiltrated ferrous metal product is disclosed. A, ferrous metal powder is formed and sintered into a porous product weighing less than 5 ounces. The ferrous metal powder product has a contact surface. A wire or sheet metal infiltrant pre-form is, provided. The pre-form is made of a copper-based alloy. The alloy contains elements that reduce, the likelihood of erosion of iron in the porous compact. Preferably the , infiltrant pre-form material, includes copper and at least about 2.5% iron be weight. A typical pre-form for making this size of, product will weigh about 1/2 ounce. The shaped pre-form is placed on the contact surface of the, porous …
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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 April 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2024.
- 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.