Stabilization of peroxygen bleach in enzyme-containing heavy duty liquids
CA 2083087 A1 · Owner: Mccown, Jack T. · Inventors: Kuzmenka, Daniel J.; Mccown, Jack T.; Van De Pas, Johannes, C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application provides heavy duty liquids in which enzyme stability is maintained without sacrifizing peroxygen bleach stability. In one embodiment of the invention stability is provided using protein having a MW of from about 1,000 to about under 50,000. In a second embodiment stability is provided using a carboxylic acid selected from the group consisting of acetic acid, propionic acid adipic, acid and salts thereof.
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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 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2014.
- 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.