Method and measuring device for measuring at least one property of a moving web
CA 2390198 C · Owner: Metso Automation Oy · Inventors: Moisio, Hannu; Ojala, Mauri; Koivu, Jari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
19 The measuring device comprises at least one measuring head having a reference part which comprises a reference surface against which the moving web is supported. The reference surface comprises a measuring area in the inside of which the property of the web is measured. The reference part is arranged in connection with the measuring head in such a way that below the reference part there is a substantially open air space. The measuring head comprises means for generating negative pressure in the air space below the reference part and the reference part comprises holes formed through it in such a way that the negative pressure generated in the air space affects through the reference part …
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 July 2, 2002 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2024.
- 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.