Adhesive tape closure
CA 2055402 A1 · Owner: Kreckel, Karl Werner · Inventors: Kreckel, Karl Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesive tape closure for sealing or packaging containers is described, including a backing having an adhesive coating on one side thereof, and a release coating on the other side thereof. The adhesive tape closure has no adhesive in intermittent limited portions thereof 80 that adhesive sections of the adhesive coating on the backing are separated by non-adhesive sections on both sides thereof. Alternatively, the non-adhesive sections may be free of adhesive or the surface of the pressure-sensitive adhesive coating is inactivated in said non-adhesive sections, or the activatable adhesive is not activated in the said non-adhesive sections. -1-
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 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 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.