Surface element for a heatable floor with hollow spaces
CA 2000593 C · Owner: Siegmund, Helmut Dieter · Inventors: Siegmund, Helmut Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A surface heating element for placement on a sub-floor and for making a heatable hollow space floor includes a plastic sheet having deep drawn protuberances forming spacers strengthened by ceramic support bodies or by a hardened finish material. The same sheet, or a second sheet connected to it forms a carrier plate for carrying hot water tubes or other heating elements. The carrier plate may include deep drawn dogs, extending in a direction opposite to the protuberances for holding the heating elements to the carrier plate; and a hardened finish may be used to embed the heating elements.
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 12, 1989 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 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.