A process for the conversion of mixed plastic waste
CA 2313012 A1 · Owner: Szekely, Tamas · Inventors: Szekely, Tamas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the conversion of a mixed plastic waste by means of mechanical treatment of the starting material mixture in the presence of a mineral oil. The essence of the invention consists therein that a crushed plastic waste mixture containing about 20 % by weight of low density polyethylene with a softening point below 150 ~C is heat-treated in an oily medium in an apparatus exerting intense kneading-moulding effect at a temperature between 150 ~C and 250 ~C under vigorous stirring until the formation of a quasi-homogenous, liquid-phase or meltphase bitumen-like material , then separating the bitumen-like material obtained.
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 December 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2020.
- 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.