Inverting spring assembly
CA 2332454 A1 · Owner: Zerfas, Gerald B. · Inventors: Zerfas, Gerald B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inverting spring assembly (10) including a housing a resilient member , (12), and an actuator (14). The housing includes a first support (16) a , second support (18) opposite the first support a third support (20), and a , fourth support (22) opposite the third support. The first support and second support are a distance Y from another. The resilient member has a first end and a second end and is longer than Y. The resilient member is spaced between the first support and the second support with one end of the resilient member supported by the first support and the other end supported by the second support. The actuator is connected to the housing and appplies force to the resilient …
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 May 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2021.
- 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.