Detergent compositions inhibiting dye transfer
CA 2179265 C · Owner: Fredj, Abdennaceur · Inventors: Fredj, Abdennaceur; Johnston, James Pyott; Willey, Alan David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dye transfer, inhibiting composition comprising a mixture, of polyamine N-oxide polymers having a low, and high oxidation degree said polyamine N-oxide, polymers containing units having structural formula (I), wherein P is a polymerisable unit, whereto the N-O group can be attached to or wherein the N-O group forms part of the polymerisable unit. A is (a) (b), (c), -O-, -S-, (d); x is 0 or 1; R are aliphatic ethoxylated, aliphatic, aromatic, heterocyclic or alicyclic groups whereto the nitrogen of the N-O group can be attached or wherein the nitrogen of the N-O group is part of these groups.
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 January 13, 1995 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2017.
- 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.