Stratified press fabric
CA 2500128 C · Owner: Albany International Corp. · Inventors: Hansen, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stratified press fabric (10) for the press section of a paper machine includes a base fabric (30) in the form of an endless loop. A first staple fiber batt material (40) is attached to the outer side of the base fabric (44) by needling. A fine fabric covers the first staple fiber batt material and a , second staple fiber batt material (50) is attached to the fine fabric by needling. The fibers making up the second staple fiber material are finer that is, of smaller diameter or denier than the fibers making up the first , staple fiber material. The fine fabric prevents the coarser fibers of the first staple fiber batt material from being needled therethrough to mix with the finer …
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 October 28, 2003 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.