Catalysts
CA 2019208 A1 · Owner: Runciman, Peter James Inglis · Inventors: Runciman, Peter James Inglis; Pickering, Anthony; Walton, Nicholas John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst for addition polymerisation (in particular the bulk addition polymerisation of acrylics) comprising, (a) an (initiator) first component of formula (I): MX(Yn)Zp (I), wherein, M is Si, Ge or Sn; n is 0 or an integer, and p is an integer such that (n + p) = 3;, X is a radical , where Q and Q1 are each independently N, P or As; Q2 is O, S, NR or PR where R is C1-4, alkyl; R1 is H or optionally substituted hydrocarbyl; and, R2 and R3 are each independently optionally substituted hydrocarbyl, or R2 and R3 together are optionally substituted aliphatic hydrocarbadiyl; all such R1, R2 and R2 being inert in the conditions of the process of the present invention; Y is A or OA where A is …
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 June 18, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.