Vinylidene chloride copolymer films
CA 2050140 A1 · Owner: Blemberg, Robert John · Inventors: Eckstein, John P.; Nordness, Mark E.; Blemberg, Robert John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Materials made with vinylidene chloride methylacrylate copolymer having a methylacrylate content of at least about 8 percent by weight. Single and multiple layer structures including sheets, laminates, films, packages and the like made, with a layer of the subject vinylidene chloride methylacrylate copolymer benefit from improved properties of elongation tensile, energy absorption, secant modulus and impact strength. Subjectively, such materials are quieter and softer than comparable films having lower methylacrylate content and equivalent additives. In the alternative, the materials can be made with lower levels of, or no, plasticizer additive without a, significant reduction in barrier …
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 August 28, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2013.
- 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.