Calender
CA 2176641 C · Owner: Voith Sulzer Finishing Gmbh · Inventors: Kayser, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calender for treating a web of material includes at least two rollers forming a roller nip therebetween. A take-up device is disposed downstream from the at least two rollers. At least one longitudinal cutter is disposed between the at least two rollers and the take-up device. The at least one longitudinal cutter divides the web of material into at least two partial webs. The take-up device has at least two winding stations. Each of the winding stations corresponds to one of the partial webs.
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 May 15, 1996 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 15, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2018.
- 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.