Built liquid detergents with boric-polyol complex to inhibit proteolytic enzyme
CA 2108908 C · Owner: Lenoir, Pierre M. A. · Inventors: Thoen, Christiaan A. J. K.; Panandiker, Rajan Keshav; Lenoir, Pierre M. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Included are liquid detergent compositions containing alphahydroxyacid builder anionic and/or nonionic surfactant, pro-teolytic enzyme second enzyme, and a mixture of certain vicinal polyols and boric acid or its derivative The equilibrium constants for the boric/polyol reaction are K1 between about 0,1 and 400 l/mole and K2 between 0 and about 1000 l2/mole2.
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 April 24, 1992 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 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.