Stretch film
CA 2068908 C · Owner: 984427 Ontario Limited · Inventors: Salzsauler, Donald J.; Salzsauler, Richard G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a roll of stretched plastic film having an embossed surface for trapping air so as to facilitate unwinding of said roll of stretched film for wrapping pallet loads and particularly includes a folded edge for strengthening the edge, which folded edge is applied in a manner so as to minimize piling up of said rolled folded edge. The invention further includes the roller, apparatus and method of stretching and embossing a web of stretchable film by textured rollers.
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 19, 1992 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 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.