Rotary drilling bit
CA 1086299 A · Owner: Shell Canada Limited · Inventors: Jurgens, Rainer; Rohde, Heino; Feenstra, Robijn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A full-hole rotary bit with scraping elements (such as diamonds) and waterways in the face thereof has the scraping, elements arranged along one side of each of the waterways Ridges are arranged to guide the mud flow through the waterways.
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
- Granted September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
- 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.