Absorption of formaldehyde in closed, gastight packs
CA 2326972 A1 · Owner: Vaahs, Tilo · Inventors: Disch, Stefan; Vaahs, Tilo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A small amount of an absorber mixture comprising activated aluminum oxide and potassium permanganate deodorizes the space within closed gastight packs, in, particular the space within packs of the type in which objects or materials which, comprise polyacetal or otherwise release formaldehyde are present. Deodorization, here is the removal (i.e. elimination or absorption) of volatile constituents emerging, from plastic moldings or from plastic materials in particular cleavage , products, such as formaldehyde. The process is particularly suitable for the packaging of moldings, or of assemblies which are to be used in the medical sector in the food and , drink, sector or in any other …
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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 November 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2022.
- 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.