Micro-valve and method of manufacturing
CA 2102572 C · Owner: Stevenson, Paul Elwin · Inventors: Avant, Carlton Scott; Stevenson, Paul Elwin; Eagen, Charles Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described is a microvalve comprised of a movable spool and/or seat comprising a silicious spool having three planes, e.g. three planes aligned with all of the spool's planes, and a silicious seat conforming to the spool's planes. The spool and/or the seat may move to open or close the valve.
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 November 5, 1993 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 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.