Method of and apparatus for controlling the manufacturing process in the continuous production of gypsum-cemented workpieces
CA 2030822 A1 · Owner: Hilbert, Thomas · Inventors: Hilbert, Thomas; Thole, Volker; Hilbert, Thomas
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 controlling the manufacturing process in the continuous production of gypsumcemented workpieces, wherein, by means of a belt-type press or a similar equipment comprising a plurality of press segments joined in tandem relationship, the gypsum undergoing hydration is compacted until the end of hydration is reached. The swelling pressure created in the course of the hydration step is measured and applied to control the manufacturing process.
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 November 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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.