Process and facility for the production of mineral wool fleeces specifically from rock wool
CA 2019945 C · Owner: Mellem, Joachim · Inventors: Mellem, Joachim; Ungerer, Heinz-Jurgen; Hirschmann, Klemens
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the continuous production of mineral wool fleeces fibre-/ gas-/ air- mixtures (3,4), which are produced by several defibration units (14 to 17), are directed onto collector conveyor units (19, 21) with curved suction surfaces, which are under suction pressure (c d), for the, formation of a wool fleece (25). Here the arrangement is done in such a way, that each fibre-/ gas-/ air- mixture which is formed by the individual defibration units (14 to 17), is assigned to an imaginary suction surface which, increases in size in the direction of the movement of the conveyor, namely d > c. It is thereby possible under, constant suction pressure to produce mineral wool fleeces of good production …
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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 June 27, 1990 and granted November 30, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2012.
- 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.