Device for closing, with a security seal, a container of a rigid material, such as glass, by means of a screw cap of rigid thermoplastics material
CA 2050595 A1 · 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
The end wall (1) of a screw cap (A) of rigid thermoplastics material is provided with a sealing ring (3) of heat-polymerised plastisol and the cylindrical skirt (2) of the cap has an internal multiple thread at its upper end, an intermediate opening tear-strip (5), and a lower part (7) with an internal annular engagement rib (8) which snap-engages under an annular rib (13) of triangular cross-section situated below the thread (12) of the threaded neck (B) of a rigid container. The annular rib (8) of the cap (A) is interrupted in a plurality of zones (9) and the neck (B) of the container has a corresponding plurality of projections (16) which extend downwards from the base of the …
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 April 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2012.
- 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.