Catalyst for treating waste plastics
CA 2238339 C · Owner: Yang, Yali · Inventors: Yang, Yali
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to catalysts for treating waste plastics. Comprising a carrier of silica and an active ingredient of following formula: Aa Bb A1c Nd Nae Caf Feg Ox, wherein: A is k, Ba, P V, Cr, rare earth elements or mixtures thereof; B is Mo, Ni, Ge, platinum series elements or mixtures thereof; M is W; a is 25.00-26.35 %, b is 36.00-37.05 % c is 7.20-9.00 %, d is 1.14-1.55 %, e is 1.75-2.15 % f is 2.40-2.80 %, g is 2.42-3.20 %. X is the total number of the oxygen atoms required for satisfying valency of all elements in said catalyst.
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 February 12, 1996 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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.