Process for preparing expandable fibrous material
CA 2355209 A1 · Owner: Kumlin, Jerry · Inventors: Kumlin, Jerry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the manufacture of expandable elements having a determined shape, whereby a mass (1) consisting of organic fibres, which are expandable by the addition of a hydrophilic liquid is , compressed in one or more determined directions to a density of 300 to 1500 kg/m3, preferably 600 to 800 kg/m3, and that elements having the determined form are shaped from said mass, as well as an expandable element and its use.
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 December 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2021.
- 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.