Airlock shaft with differential core speed slipping capability
CA 2297405 C · Owner: Nimcor, Inc. · Inventors: Berube, Daniel J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expandable airlock shaft with surface mounted roller bearings provides differential core speed slipping capability for adjacent core segments on a common shaft. The shaft may be used with an expandable collet system consisting of a set of relatively, short, expandable collets, which are used with spacers where needed to accommodate, multiple core segments in any desired arrangement. Alternatively the roller , bearings may be, incorporated into the expandable collets and the shaft configured with an , expandable bearing support surface.
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 January 28, 2000 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2022.
- 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.