Softener active derived from acylated triethanolamine
CA 2290409 C · Owner: Wahl, Errol Hoffman · Inventors: Trinh, Toan; Chung, Alex Haejoon; Wahl, Errol Hoffman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fabric softener compounds having the formula: RC(O)nN+(R1)mX- wherein each R in a compound is a C6-C22 hydrocarbyl group preferably having an IV from , about 70 to about 140 based upon the IV of the equivalent fatty acid n is a , number from 1 to three on the weight average in any mixture of compounds each , R1 in a compound is a C1-3 alkyl or hydroxy alkyl group the total of n and , the number of R1 groups that are hydroxyethyl groups equaling 3 n+m=4 and X , is a softener compatible anion preferably methyl sulfate, the compound or , mixtures of such compounds, having (a) either a Hunter "L" transmission of at least about 85, typically from about 85 to about 95 preferably from about 90 , …
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 April 15, 1998 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2020.
- 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.