Heating or cooling roller
CA 2002914 C · Owner: Schwabische Huttenwerke Gmbh · Inventors: Zaoralek, Heinz-Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heating or cooling roller comprises a stationary axle at, least one hydrostatic or hydrodynamic bearing element to support a rotary roller shell on the stationary axle and a, heatable or coolable heat transfer medium which flows through an annular gap between the stationary axle and the rotary roller shell; the roller shell has peripheral axially parallel orifices for the heat transfer medium which is supplied and discharged through at least one radial channel in the stationary axle and via at least one annular space between the roller shell and the stationary axle.
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 November 14, 1989 and granted November 17, 1992. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2011.
- 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.