Food trays and the like having press-applied coatings
CA 2134481 C · Owner: Archibald, William E. · Inventors: Archibald, William E.; Hopkins, Brian D.; Scherpf, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A container (10) for food includes a paper-based substrate (30) and at least one grease and moisture resistant coating (28) applied in liquid form to the paper-based substrale (30). The liquid coating (28) is preferably formed from an aqueous-based dispersion of acrylic-based material. The liquid coating (28) remains resistant to grease and moisture issuing from food at temperature in the range of about -20 °F to 425 °F.
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 26, 1993 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2015.
- 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.