Expired Canadian patentCanada
Oil well stuffing box packing
CA 2415437 C · Owner: Lappin, Scott C. · Inventors: Lappin, Scott C.
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 herein are apparatus and methods for sealing an oil well stuffing box.
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 December 30, 2002 and granted April 26, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 30, 2002
GrantedApril 26, 2011
Term endedDecember 30, 2022
Patent numberCA 2415437 C
Classification (IPC)E21B33/03 +2 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.