Port protective device in a mold
CA 1188470 A · Owner: Wetter, Bruno · Inventors: Wetter, Bruno; Grant, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for protecting fluid ports in a mold used for molding plastic cellular containers from polystyrene beads comprises an annular groove provided in the side wall of the mold, fluid ports open into the groove and an annular coil adapted to be fitted into the groove. The interstices between the coils are of such dimension as to prevent clogging of the fluid ports by expanding polystyrene beads upon their heating by a heating medium emitted from the ports.
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
- Granted June 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
- 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.