Method of and an arrangement for measuring the properties of a stiff mass to be compacted
CA 2000158 A1 · Owner: Paakkinen, Ilmari · Inventors: Paakkinen, Ilmari
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 and an arrangement for measuring the properties, particularly the degree of compaction of a stiff compactable mass such as, fresh concrete to be cast and similar soil mass. In order to make the control of compaction more effective, gaseous pressure fluid is blown through the mass during the compaction of the mass, simultaneously observing increase in the pressure of the gaseous pressure fluid in the surface portions of the mass due to increasing flow resistance. The pressure fluid is blown through an opening formed in a wall adjoining the mass to be compacted and by means of a source of pressure fluid connected to the opening. Changes in the flow resistance …
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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 4, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 4, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2011.
- 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.