Sealable films
CA 1317426 C · Owner: Exxon Chemical Patents, Inc. · Inventors: Bossaert, Bernard L. L.; Willems, William F. M. J.; Ohlsson, Stefan B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealable film having superior seal strength comprises a base layer comprising a polyolefin e.g. polypropylene, and on one or both surfaces of the base layer 1 to 20 weight % of a mixture of 70 to 95 weight % of (a) a linear low density polyethylene or a polymer of at least one olefinically unsaturated monomer, at least one of which has a functional group, e.g. a copolymer of ethylene and vinyl acetate and (b) 50 to 30 weight % of a resin of molecular weight lower than that of the linear low density polyethylene or of the polymer, e.g. a hydrogenated petroloeum resin.
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
- Granted May 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
- 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.