Coated alkali metal peroxo salts and process for producing the same
CA 2180288 A1 · Owner: Gerling, Klaus-Guenter · Inventors: Hecken, Gerd; Gerling, Klaus-Guenter; Mathes, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of lactobionic acid, lactobionic acid salts and/or lactobionic acid derivatives as covering material is disclosed for coating alkali metal peroxo salts, in particular for coating sodium percarbonate. In an advantageous alternative of the invention alkali metal, peroxo salts are provided with a covering layer that contains as covering materials lactobionic acid and/or lactobionic acid salt mixed with boric acid and/or a boric acid salt as additional covering material. This coating stabilises the alkali metal peroxo salts and protects them against humidity and decomposition. In another advantageous alternative lactobionic acid, lactobionic acid salts and/or lactobionic acid …
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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 December 17, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2016.
- 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
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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.