Method for increasing press fabric void volume by laser etching
CA 2521761 C · Owner: Albany International Corp. · Inventors: Davis, Trent W.; Donovan, James G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Press fabrics used in the papermaking process need to drain a large amount of water through the fabric. It is advantageous to give greater dewatering and drainage capacity by providing voids which are reservoirs of minimum pressure available to accept water. The present invention is a method, and the fabric made by such method whereby a water permeable press fabric is given greater dewatering and drainage capacity by providing laser etched blind-drilled voids which are reservoirs of minimum pressure available to accept water.
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 April 7, 2004 and granted June 25, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.