Sintered coining process
CA 2104607 C · Owner: Stackpole Powertrain International Ulc · Inventors: Lawcock, Roger; Jones, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of coining sintered articles of powder metal comprising: blending carbon ferro manganese, and lubricant with compressible elemental iron powder pressing the, blended mixture to form the articles high temperature sintering of the articles in a reducing atmosphere and then coining the sintered articles to final shape so as to narrow the tolerance variability of coined articles and substantially eliminate secondary operations.
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 December 21, 1992 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2014.
- 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.