Dryer fabric
CA 2060972 C · Owner: Hsu, Chien-Yeh · Inventors: Hsu, Chien-Yeh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a dryer section of a papermaking machine comprising between 10 and 20 cylinders in with each of the cylinders is gas fired to have an operating temperature of between 500°F and 700°F. A dryer fabric operating with these cylinders capable of withstanding the above temperatures. The fabric is of coil construction a porosity of between 600 and 1000 CFM. The yarn forming the fabric is a monofilament formed of PEEK.
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 February 11, 1992 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2014.
- 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.