Aqueous storable wetting agent which is low-foaming in application
CA 2026039 C · Owner: Stehlin, Albert · Inventors: Guth, Christian; Stehlin, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous, storable wetting agent which is low-foaming in application and contains a nonionic surfactant selected from the group of the partially end group blocked alkoxylated fatty alcohols is described, which contains (a) 10 to 80 % by weight of a nonionic surfactant of the general formula (1) R-O~alkylene-Op~R1, in which R is an aliphatic radical of at least 8 carbon atoms R1 is hydrogen, C1- to, C8alkyl, a cylcloaliphatic radical of at least 5 carbons atoms phenyl(lower)alkyl or styryl, "alkylene" is an alkylene radical of 2 to 4 carbon atoms and p is a number from 2 to 24 and, (b) 1 to 10 % by weight of a hydrotropic agent. The novel wetting agent is used in the treatment of textiles …
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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 September 24, 1990 and granted February 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2012.
- 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.