Acidic cleaning compositions
CA 2255633 A1 · Owner: Delucca, Barbara · Inventors: Rapisarda, Dario; Briatore, Andrea; Delucca, Barbara
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a liquid acidic composition comprising from 0.01 % to 45 % by weight of the total composition of maleic acid from 0.01 % to 25 % by , weight of a second acid having its first pKa not exceeding 5 and an amine , according to the formula RR'R"N wherein R is a saturated or unsaturated substituted or unsubstituted, linear or branched alkyl group of from 1 to 30 carbon atoms, and wherein R' and R" are independently saturated or unsaturated, substituted or unsubstituted linear or branched alkyl groups of , from 1 to 30 carbon atoms or hydrogen. These compositions deliver excellent limescale removal performance as well as outstanding greasy soap scum cleaning on …
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 May 16, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2019.
- 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.