Biocide activator
CA 2036539 C · Owner: Iwasaki, Tetsuji · Inventors: Iwasaki, Tetsuji; Kurita, Kazuhiko; Hioki, Yuichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The biocidal effect of a biocide can be enhanced with the use of an effective amount of a compound having the formula (I):, wherein at least one of R1 R2. and R3 represents, a straight-chain or branched alkyl or alkenyl group having 8 to 30 carbmn atoms while other(s) represent a group or a combination selected from among -CH3, -CH2CH3, arid , groups (wherein n is from 1 to 5;, R4 represents a -CH3 or -CH2CH3 group; and a counter ion X~ is an anion residue of an acid of an anionic oligomer or polymer having an average molecular weight of from 300 to 20,000.
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 February 18, 1991 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2013.
- 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.