Multi-part sequential valve gating
CA 2434718 C · Owner: York, Russell R. · Inventors: Smith, Michael B.; Korte, Keith; York, Russell R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention (Figure 1, 1, 2, 3 4, 5, 6, 7, 8 9 10, 11, 12, 13, 14, 15 16, 17, 18) provides an injection molding method and apparatus. A hot manifold is provided having a plurality of independently controlled valve gates. A controller is operably connected to each of the valve gates enabling independent opening and closing thereof. A mold has at least two cavities a , larger cavity and a relatively smaller cavity. The larger cavity has at least two inlets each communicating with the valve gates of the hot manifold. The smaller cavity has at least one inlet communicating with respective valve gate of the hot manifold. The larger cavity is filled with a first plasticized …
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 January 29, 2002 and granted July 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2024.
- 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.