Liquid compositions containing n-alkyl ammonium acetonitrile salts
CA 2273090 A1 · Owner: Deline, James E. · Inventors: Garabedian, Aram Jr.; Choy, Clement K.; Petrin, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides liquid cleaning or bleaching compositions containing compounds having the structure of Formula (I) wherein A is a saturated ring formed by five atoms in addition to the N1 atom the five saturated ring atoms , being four carbon atoms and a heteroatom the substituent R1 bound to the N1 , atom of the Formula (I) structure including either (a) a C1-24 alkyl or alkoxylated alkyl where the alkoxy is C2-4 (b) a C4-24 cycloalkyl, (c) a C7-, 24 alkaryl (d) a repeating or nonrepeating alkoxy or alkoxylated alcohol where the alkoxy unit is C2-4, or (e) -CR2R3CN where R2 and R3 are each H a , C1-24 alkyl, cycloalkyl, or alkaryl or a repeating or nonrepeating alkoxyl or …
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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 November 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2019.
- 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.