Method and apparatus for producing a composite plastic article
CA 1079920 A · Owner: Von Holdt, John W. · Inventors: Von Holdt, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A half-section of a cassette casing having an embedded transparent wafer serving as a viewing window. The cassette casing section is formed by shearing the wafer from an elongated strip of transparent material disposing and supporting the wafer within a cavity and, forcing a plasticized material into the cavity where it solidifies. The cavity is defined in an injection mold comprising a pair of relatively movable cavity plate assemblies with which are associated means for shearing and supporting the wafer.
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 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- 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.