Method and device for manufacturing mineral fibres
CA 2229421 C · Owner: Gorobinskaya, Valentina · Inventors: Sojref, Dalik; Gorobinskaya, Valentina; Kravtchenko, Irina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process and apparatus for the manufacture of mineral fibres, The invention relates to a process for the manufacture of, in particular, continuous mineral fibres from rock glass-containing technical wastes, technical glass wastes and to an apparatus. The object of the invention is to create a process which enables the said group of starting materials to be processed from a stable melt to give in, particular, continuous fibres and thus to improve fibre quality and processability. The starting products are melted in a melting bath, transferred to a forehearth a feeder, device and then fed to a bushing device and from there taken off as thread, the melt being fed to the feeder device from a …
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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 9, 1996 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2018.
- 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.