Papermaking press felt
CA 2434244 A1 · Owner: Ohno, Hirokuni · Inventors: Watanabe, Kazumasa; Ohno, Hirokuni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An endless papermaking press felt comprises a base and a batt layer intertwiningly integrated with the base. The batt layer comprises a wet paper web side layer and a machine side layer formed on an outer surface and inner surface of a base respectively. The base is manufactured from belt-shaped partial base bodies, which are connected to one another in side-by-side relationship. The press felt can be manufactured easily and at reduced cost.
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 3, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2025.
- 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.