High-density glass fibre granules
CA 2502333 A1 · Owner: Font, Dominique · Inventors: Bastard, Michel; Blanchard, Jean-Francois; Font, Dominique
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of preparing glass fibre granules by mixing the cut glass fibres in the presence of 10 to 25 % water said fibres being sized using a size comprising an organosilane. According to the invention the cut glass fibres are mixed for a sufficient length of time such that the density thereof increases by at least 67 % using a single mixing device which mixes the fibres or the granules forming therein constantly at the same frequency. After drying the end granules formed contain at least 95 wt.- % glass a tackifier being brought into contact with the glass fibres at the latest during the aforementioned mixing operation.
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 21, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2025.
- 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.