Improved print lock process
CA 2082008 C · Owner: Cryovac, Inc. · Inventors: Wood, John Cresswell; Brown, James Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminated printed shrinkable film comprising at least a first unprinted shrinkable film laminated to a second printed shrinkable film. Preferably each said shrinkable film is shrinkable at a temperature no higher than 100°C. The laminated printed film can be in the form of tubing suitable for sealing to make into a bag. The bag can be end-sealed or side-sealed. Bags made of such laminated printed film are useful in packaging food items such as meat.
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 3, 1992 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 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.