Machine dishwashing composition
CA 2091791 A1 · Owner: Rocourt, Antoine P. A. F. · Inventors: Van Drunen, Rudolf W. P.; Rocourt, Antoine P. A. F.; Van Dijk, Willem R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved phosphate-free, particularly phosphorus-free machine dishwashing composition comprises a non-phosphate builder, such as zeolite, alkalimetal citrate alkalimetal, carbonate and bicarbonate and mixtures thereof, wherein the, amount of carbonate and/or bicarbonate if present does not, exceed 50% by weight of the composition and contains an, effective amount of a biodegradable poly-amino acid compound of the formula:, Poly (X)n, wherein each X is independently aspartic acid or salts thereof, glutamic acid or salts thereof glutamine, asparagine, or mixtures thereof; and n is 3 to 1000.
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 March 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 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.