Filtering debris from molten plastic
CA 2086134 A1 · Owner: Infanti, Salvatore · Inventors: Infanti, Salvatore; Kopernicky, Jaroslav J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter for removing debris from a flow of molten plastic includes a cartridge containing a screen and a holder which seats one face of the cartridge. The flow of molten plastic is directed at an acute angle through the screen producing a filtered plastic flow through a downstream face of the screen and a flow of debris separated from the filter plastic along the upstream screen face. A compartment extends along the upstream screen face and accumulates the separated debris. A passage in the holder communicates with the debris-accumulating compartment and discharges the accumulating debris. A cooling mechanism regulates the rate at which debris is discharged. - 18 -
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 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2014.
- 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.