Expired Canadian patentCanada
Pulsed electric rock drilling, fracturing, and crushing methods and apparatus
CA 2821140 C · Owner: Sdg Llc · Inventors: Moeny, William; Hill, Gilman
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for pulsed power rock drilling apparatuses systems, and methods and an electrical insulating fluid applicable to the embodiments disclosed.
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 August 22, 2005 and granted March 14, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 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.
FiledAugust 22, 2005
GrantedMarch 14, 2017
Term endedAugust 22, 2025
Patent numberCA 2821140 C
Classification (IPC)E21B7/00 +1 more
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.