Peel seal zipper tape
CA 2204713 C · Owner: Ramsey, Ronald L. · Inventors: Share, Lawrence; Ramsey, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A peel seal zipper tape for reclosable plastic bags or packages includes a first and a second mutually interlocking zipper profile disposed on a top surface of a laminated film strip. The top surface is formed by a layer of a sealant material. The laminated film strip also has a bottom surface formed by a layer of a non-peel-seal material. In use the, laminated film strip is folded over enabling the zipper profiles to be interlocked with one another. In so doing portions of the top surface of the, laminated film strip face one another so that they, may be joined with a heat seal. The outside of the folded peel seal zipper tape, that is, the bottom surface of non-peel-seal material, is …
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 May 7, 1997 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2019.
- 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.