Expired Canadian patentCanada
Thermally stable polycrystalline diamond materials, cutting elements incorporating the same and bits incorporating such cutting elements
CA 2537633 C · Owner: Keshavan, Madapusi K. · Inventors: Keshavan, Madapusi K.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting element is provided including a substrate and a TSP material layer over the substrate. The TSP material layer includes at least a property having a value that varies through the layer.
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 23, 2006 and granted January 14, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2026.
- 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.
FiledFebruary 23, 2006
GrantedJanuary 14, 2014
Term endedFebruary 23, 2026
Patent numberCA 2537633 C
Classification (IPC)E21B10/46
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.