Closure for sliderless zipper bags
CA 2082486 C · Owner: Minigrip, Inc. · Inventors: Tilman, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reclosable bag is formed of walls defining a closure with a mouth. Adjacent to the mouth the bag is formed with interlocking male and female profiles for selectively opening and closing the mouth. Beams are also provided on the inner surfaces of the walls positioned to insure that the male and female profiles do not open inadvertently. Finger guide members may also be provided above the profiles to insure that the bag is closed properly.
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 November 9, 1992 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2014.
- 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.