Expired Canadian patentCanada
Geosynthetic composite for borehole strengthening
CA 2567092 C · Owner: Cowan, Kenneth Michael · Inventors: Cowan, Kenneth Michael
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a composition comprising a chemical formulation useful for creating geosynthetic composites in-situ that includes a melamine-formaldehyde resin in a non-aqueous drilling fluid.
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 June 2, 2005 and granted March 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 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.
FiledJune 2, 2005
GrantedMarch 26, 2013
Term endedJune 2, 2025
Patent numberCA 2567092 C
Classification (IPC)E21B33/13
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.