Article of manufacture with moisture-insensitive oxygen barrier properties
CA 1301404 C · Owner: Basf Aktiengesellschaft · Inventors: Akkapeddi, Murali Krishna; Gervasi, Jay Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article of composition which has a barrier layer of an amorphous nylon copolymer. The copolymer is polymerized from (A) a lactam or aminoalkanoic acid such as caprolactam, (B) an aralkylene or cycloalkylene diamine, such as m-xylylenediamine, and (C) one or more aromatic diacids, such as isophthalic acid and terephthalic acid. The copolymer barrier layer exhibits excellent oxygen barrier resistance when exposed to moisture.
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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 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.