Extrusion die system with removable insert
CA 2270674 A1 · Owner: Kimberly-Clark Worldwide, Inc. · Inventors: Cook, Michael Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A die system for the extrusion of polymer permits external cleaning and maintenance without shutting down the operation. Removable die inserts are located, on one or both sides of the die opening section through which polymer is extruded. The inserts are spaced from the die opening section by a very small distance, so as, to avoid interfering with the opening section. When molten polymer accumulates and burns in areas surrounding the die opening section the inserts can be , removed, and replaced without interrupting the extrusion of polymer.
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 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2021.
- 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.