Method and apparatus for making high compression structural foam
CA 2287486 C · Owner: Thompson, Edward J. · Inventors: Thompson, Edward J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A structural foam billet made from a plurality of blobs of foam forming stock which are spaced from one another in a predetermined order and expanded into the structural foam billet. Refering to the figure an apparatus for making a , structural foam billet having high compression strength comprising: a moving conveyor surface (282), a means (274) for delivering foam forming stock to the moving conveyor surface, and means (260 262, 264, 266, 268, 270 and 272) for , arranging foam forming stock on the conveyor surface in a plurality of separate blobs, each blob having a mass of non-distinctive shape and each blob spaced from the other blobs in a predetermined order.
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 4, 1998 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2020.
- 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.