Zipper material and configuration
CA 2129405 C · Owner: Carlson, Todd · Inventors: Carlson, Todd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A resealable package formed from one or more sheets of an ionomrt resin includes an ethylenemethacrylic acid copolymer in the zipper or between, the zipper and the sheet or sheets. The zipper itself includes male and female interlocking zipper profiles, one or both of which may be extruded from an ethylene-methacrylic acid copolymer. Alternatively strips of this copolymer may be, applied to the sheet or sheets of ionomer resin and, male and female profiles of a more commonly used polymeric material, such as low density polyethylene may be applied to the strips. Ribs of the ethylenemethacrylic acid copolymer may also be applied to the sheet or sheets parallel 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
- Filed August 3, 1994 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2016.
- 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.