A paste-form low-foaming non-phosphate detergent
CA 2003519 C · Owner: Henkel Kommanditgesellschaft Auf Aktien · Inventors: Trabitzsch, Uwe; Amberg, Guenther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paste-form, non-phosphate detergent which is particularly suitable for the washing of heavily soiled working apparel and which generates no troublesome foam containing (A) 1 to 3% by weight sodium alkyl benzene sulfonate having linear C9-13 alkyl chains, (B) 14 to 18% by weight of a linear or 2-methyl-branched, saturated primary C12-15, alcohol containing 2 to 4 ethylene glycol ether groups (C), 12 to 16% by weight of a linear or 2-methyl-branched saturated, primary C12-15 alcohol containing 6 to 8 ethylene glycol ether groups, (D) 50 to 65% by weight sodium silicate having the composition Na2O : Sio2 = 1 : 0.8 to 1 : 1.5, (E) 2 to 8% by weight, based on sodium salt of at, least one …
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 November 21, 1989 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2011.
- 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.