Leakproof zipper with slider
CA 2076635 C · Owner: St. Phillips, Eric Anthony · Inventors: St. Phillips, Eric Anthony; Herrington, Fox John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A leakproof plastic reclosable fastener or zipper with slider (11) particularly suited for thermoplastic bags. The zipper is formed by reclosable interlocking rib and groove profile elements (17, 18) on respective strips and the strips each include profiled track structure (19, 20) extending along the length thereof parallel to the rib and groove elements (17 18). A straddling, slider (11) is positioned on the strips for closing or opening the reclosable fastener elements (17, 18). The slider (11) includes depending side walls (11b, 11c) for maintaining the track structure (19, 20) and the rib and groove elements (17 18) therebetween. The slider (11) also includes separator structure …
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 February 27, 1991 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 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.