Biodegradable quaternary hair and skin conditioners
CA 2196803 C · Owner: Friedli, Floyd · Inventors: Allardice, Andrea Susan; Manning, Monna Marie; Friedli, Floyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are conditioning compositions for the hair and skin containing compounds of the formula (R1)(R2)N(CHCH2OC(O)R)2X-; wherein R1 is alkyl containing 1 to 6 carbon atoms, or hydroxyalkyl containing 1 to 6 carbon atoms; R2 is alkyl containing 1 to 6 carbon atoms or benzyl; X- is an anion; , and R is alkyl and alkylene of 12 to 22 carbon atoms having 0 to 3 carboncarbon double bonds, provided that at least 2 different chain lengths R are present and 0, 1 and 2 such double bonds are present.
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 August 7, 1995 and granted October 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.