Process and product
CA 1054871 A · Owner: Toa Nenryo Kogyo K.K. · Inventors: Wada, Shozo; Ishibashi, Kazushige; Yoda, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The adhesive strength of a metallic layer prepared by vacuum metallizing on an unsaturated carboxylic acid modified polyolefin article is substantially increased by heating below the melting point of the polyolefin after the metallization. Preferable heating temperature is 92 - 157°C for polypropylene and heating time is 10 sec. - 1 hour. An aluminum layer obtained by this invention has remaining ratio of 100% after cross cut test.
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 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- 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.