Screw cap of thermoplastics material
CA 1319648 C · Owner: Alplast S.P.A. · Inventors: Margaria, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screw cap of Thermoplastics Material A screw cap of thermoplastic material, particularly intended for the closure of glass containers used in the food industry, is provided on the outer surface of its horizontal end wall with a thin covering layer of a composite laminated material which is adapted to form a barrier against the passage of gases through the wall. This composite, laminated material is constituted by a disc incorporated in the outer face of the horizontal end wall of the cap during the injection moulding of the cap. The disc is permanently bonded to the horizontal end wall of the cap and to a downwardly-curved wall connecting the peripheral edge of the horizontal end wall to …
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 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.