Injection molding process for the production of oriented thermoplastic and particulate matter composite articles
CA 2134424 A1 · Owner: Woodhams, Raymond T. · Inventors: Woodhams, Raymond T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved injection molding apparatus for the manufacture of an article formed of a thermoplastics material having a melt index selected from the range 50°C - 350°C, comprising an article-shaping mold in communication with a melted feed means for intermittently feeding said thermoplastics material under pressure and at a temperature above said melt index in a first mold-filling and article-shaping amount to said mold; said mold having (i) cooling means within said mold for cooling said melted thermoplastics material below said melt index to form a cooled said article; (ii) means for opening, said mold to allow removal of said cooled article; (iii) means for sealably closing said mold for …
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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 October 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2016.
- 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.