Method and device for examining a surface-active substance
CA 2447699 A1 · Owner: Amrein, Matthias · Inventors: Amrein, Matthias; Knebel, Detlef
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 a device for examining the properties especially physical properties, of a surface-active substance. A fluid is introduced in the form of a test volume into another fluid which cannot be mixed therewith, whereby at least one boundary layer is formed in a partial area of a surface of the test volume between the first fluid and the second fluid. The test volume is embodied in an axially symmetric manner around a given defining axis, whereby the boundary layer is formed in such a way that it is axially symmetrical in relation to the given defining axis. The surfaceactive substance is spread over the boundary layer in order to form a surface film in …
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 May 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 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.