Substrate for the controlled release of volatile substances
CA 2250227 A1 · Owner: Albath, Heidrun Elisabeth · Inventors: Ruckleben, Maren; Albath, Heidrun Elisabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The description relates to a substrate for the controlled release of volatile substances which can be applied to the substrate in metered quantities in , which the substrate is flat, at least one of its surfaces has one or more recesses (2) to accept and store the volatile substances where the ratio of , area to volume of the substrate is at least 1 x 102 m-1 and the substrate , consists of a material which is chemically inert to the volatile substances and/or their solvents. The substrate may take the form of at least one base (1) with the largest possible area. The recesses (2) may take the form at least partly of apertures (2) where the ratio of the surface to the volume of the …
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 March 25, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2019.
- 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.