Unit for drying gypsum plaster board
CA 2470205 A1 · Owner: Weichgrebe, Ernst-Martin · Inventors: Straetmans, Christoph; Weichgrebe, Ernst-Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Modern drying units for gypsum plaster board have a feed device comprising , several roller feed units (1) arranged in levels one above the other. The drying section is generally divided into several zones (3 to 7) in particular , three longitudinally ventilated zones (4 to 6) being two high temperature , zones (4, 5) and a subsequent low temperature zone (6). Due to the high production capacity of the upline production plant and the necessarily long residence time, drying units are very long. According to the invention black , boards (19) are arranged above and below the individual roller feed units (1) in the high temperature zones (4, 5), which extend across the width of the roller …
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 August 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2024.
- 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.