Molding multi-layered articles using coinjection techniques
CA 2286278 A1 · Owner: Dtl Technology Limited Partnership · Inventors: Rollend, George F.; Beck, Martin H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-cavity coinjection mold (10) and method for simultaneously producing a plurality of multi-layered articles comprising: a mold structure defining a plurality of mold cavities (12); a first supply source (26) for supplying metered amounts of a first molding material; a second supply source (28) for supplying metered amounts of a second molding material; a hot runner system (24) in communication with the first (26) and second (28) supply sources for conveying the metered amounts of the first and the second materials separately to a region proximate each of the cavities; a valve mechanism (20) per cavity for receiving the metered amounts of the first and second materials from …
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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 April 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 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.