Earth-boring bits
CA 2564082 C · Owner: Oakes, James J. · Inventors: Mosco, Alfred J.; Stevens, John H.; Collins, Gabriel B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles wherein the hard particles comprise at least one carbide nitride, boride, and , oxide and solid solutions thereof and a binder binding together the hard particles. The binder may comprise at least one metal selected from cobalt nickel, and iron, and, optionally, at least one melting point reducing constituent selected from a transition metal carbide in the range of (30) to (60) weight percent, boron up to (10) weight percent silicon up to (20) , weight percent, chromium up to (20) weight percent and manganese up to (25) , weight percent …
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 April 28, 2005 and granted June 25, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.