Vehicle leaf spring with a longitudinal discontinuity for crack propagation
CA 2099762 C · Owner: Oxford Suspension, Inc. · Inventors: Pierman, Richard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle suspension member such as a leaf spring (50) is provided comprising at least one composite leaf or plate (2) having a second layer (12) sandwiched within a first layer (10) in such a manner as to provide at least one discontinuity therein effective to divert crack propagation in a direction generally parallel to a longitudinal axis ("L/A") extending between opposite ends of plate (2).
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 29, 1993 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2015.
- 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.