Fire barrier
CA 2277115 C · Owner: Heller, Paul · Inventors: Heller, Paul; Barnes, Vaughn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fire barrier (12) for use in dynamic voids to seal against the spread of fire. Flexible foil-backed insulation material (22) is supported by a woven metallic support screen (18) positioned in the void. As the surfaces (14 16) , defining the void undergo relative movement the ability of the individual , wire elements of the screen (18) to move in a scissor-like fashion relative to one another allows the screen to distort laterally without shearing wrinkling, or buckling while the insulation material (22) floating thereon is effectively isolated from any shear forces. The foil backing (20 24) allows , the insulation (22) to freely shift relative to the support screen (18).
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 January 7, 1997 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2019.
- 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.