Screen structure for use in the manufacture of a fiber product
CA 2536965 C · Owner: Niiranen, Heikki · Inventors: Niiranen, Heikki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method and apparatus for feeding chemical into a liquid flow. The method and apparatus according to the invention are especially suitable for applications where very small volumes of chemical must be fed in precise amounts in large process liquid flows.
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 August 20, 2004 and granted March 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2026.
- 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.