Submersible well pump with improved diaphragm
CA 2489671 C · Owner: Smith International, Inc. · Inventors: Traylor, Leland B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite diaphragm for a hydraulically driven diaphragm pump that incorporates both non-rigid and semi-rigid materials to obtain the benefits of both wherein the non-rigid materials provide desired resistance to flex fatigue and wherein the semi-rigid materials provide desired shape characteristics to thereby increase pumping capacity of a hydraulically driven positive displacement diaphragm pump.
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 8, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2024.
- 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.
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.