Molding interior undercut shapes in non-hollow plastic parts
CA 2419265 A1 · Owner: Wilger, Jason H. · Inventors: Wilger, Jason H.; Wilger, Wilfred H.; Rogers, R. Barry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotational molding method for forming two separate molded parts each including an undercut portion includes providing a mold formed from two mold, parts connected at a mold junction introducing a particulate plastics , material and rotating the mold about two axes while applying heat to the mold so as to cause the, plastics material to melt within the hollow interior and adhere to the inside surface. An annular heat conduction member extends from an outer edge outside the mold through the junction between the two mold parts to an inner edge inside the hollow, interior and carries two undercut mold portions for molding respective undercut, portions of the two separate molded parts. A …
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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 February 20, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2025.
- 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.