Non-wax film structures useful for packaging food products
CA 2413384 A1 · Owner: Buelow, Duane H. · Inventors: Littmann, Richard; Hodson, Jay D.; Buelow, Duane H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Film structures (14) containing no wax and having three layers comprise: a first skin layer (20), a second core layer (22) and a third sealand layer , (24). The first layer contains at least one polymer and a hydrogenated hydrocarbon, the second layer contains at least one polymer a hydrogenated , hydrocarbon, and regrind material and the third layer contains at least one polymer, a cheese release agent, and an optional adhesive. The films are useful for packaging foods, especially cheese.
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 June 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2023.
- 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.