Preferentially strengthened tamper-indicating plastic closure
CA 2071532 A1 · Owner: H-C Industries, Inc. · Inventors: Mcbride, Stephen Wayne; Trump, Hubert Dale; Smeyak, Lawrence Matthew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamper-indicating plastic closure (10) includes a pilfer band (24) at least partially detachably connected to a skirt portion (16) of the closure (10) by a frangible connection. The frangible connection comprises a plurality of circumferentially spaced frangible bridges (34), which fracture attendant to removal of the closure (10) from an associated container (C) to provide visually discernable evidence of opening. In order to facilitate high-speed application of the closure (10) to a container (C) one or more, regions of the frangible connection are preferentially strengthened by the provision of relatively strengthened frangible bridges (34A, 34B). At least one of the strengthened …
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 August 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2013.
- 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.