Degradable disposable polyolefine compositions
CA 1090498 A · Owner: Imperial Chemical Industries Limited · Inventors: Brackman, Derek S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastics compositions especially poly-, olefine compositions contain a metal carboxylate plus, a free carboxylic acid as a synergistic prodegradant. Iron stearate plus extra stearic acid is an effective mixture for low and high density polyethylene. The compositions are useful for making disposable plastic wrappings containers and the, like.
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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- 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.