Bleaching regulator compositions and bleaching processes using them
CA 2088952 A1 · Owner: Raimann, Wolfgang · Inventors: Raimann, Wolfgang; Pfeiffer, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bleaching regulator compositions and bleaching processes using them, A b s t r a c t, Bleaching regulator compositions of good ecological tolerance which, in the anhydrous and alkali-free form comprise magnesium ions as a composition for example, in, the form of magnesium oxide gluconic acid and nitrilo-, triacetic acid and furthermore can contain citric acid are described. they contain no ethylenediaminetetraacetic acid (EDTA), no phosphates and no phosphonates. Le A28 890 - Foreign countries
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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 February 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2015.
- 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.