Anti-scaling agent for coating of polymerization reactors
CA 2219665 C · Owner: C.I.R.S. S.P.A. · Inventors: Sattin, Mario; Carlin, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is to provide an anti-scaler for coating the polymerizing reactors for monomers, of the liquid types obtained by means of the naphthols condensation with analdehydic cross-linking product, characterized by that: for obtaining the condensate a hydrosulphite is used; it contains hydrosulphite and/or radical bisulphites and/or bisulphite; the condensate is made in such a way that in absence of oxygen, it is in the form of liquid of clear transparent colour.
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 May 7, 1996 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2018.
- 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.