Nozzle for gas assisted injection molding
CA 2110168 C · Owner: Johnson, Tom W. · Inventors: Johnson, Tom W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nozzle for the injection of a viscous fluid such as a thermoplastic and a , non-viscous fluid such as a gas into a mold cavity of a mold body includes a valve element (48) mounted for reciprocation in a nozzle body flow passage (28) to control a flow of viscous fluid through the nozzle body discharge end and into a mold cavity (169). The valve element includes a barrel (50) having a first end selectively engaging a portion of the nozzle body discharge end to prevent a flow of viscous fluid therepast and a second end. A bore (64) extends longitudinally through the barrel and a pin (80) is positioned in the barrel bore. The pin has a first end located adjacent the barrel first end such …
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 29, 1992 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2014.
- 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.