Surface cleaning agent
CA 2101651 C · Owner: Institut Neorganicheskoi Khimii Sibirskogo Otdelenia Rossiiskoi Akademii Nauk · Inventors: Tochilin, Vladimir Nikolaevich; Sidorov, Valentin Dmitrievich; Kolosanova, Valentina Andreevna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An agent for cleaning surfaces comprises a surfactant an alkyl phenol, an alkali additive and water. As a surfactant, it includes oxyethylated alkyl phenol and/or oxyethylated fatty alcohol. The ratio of the components is as follows, % by mass:, oxyethylated alkyl phenol and/or oxyethylated fatty alcohol 0.1-3.0, alkyl phenol 0.005-0.003 alkali additive 0.2-0.5, water the balance.
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 November 29, 1991 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 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.