Process and apparatus for manufacturing a flue made of fiber-reinforced plastic, particularly of a stack for discharging chemically aggressive fumes
CA 2082029 C · Owner: Gruppo Sarplast S.P.A. · Inventors: Cargnelutti, Mario
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 process for manufacturing a flue made of fiber-reinforced plastic (FRP) particularly of, a stack for discharging chemically aggressive fumes which, consists in manufacturing the FRP flue directly inside the stack. The apparatus for performing the above process comprises a rotating carousel which supports a first work station, a second work station and at least a third work station to progressively and constantly deposit on a, stationary mold, at least one first layer of chemically resistant material and at least one layer of mechanically resistant material in order to form, without discontinuities, a central portion of the flue of the stack.
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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 November 3, 1992 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2014.
- 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.