Thermoplastic materials
CA 1090934 A · Owner: Chemische Werke Huls Aktiengesellschaft · Inventors: Blumel, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved thermoplastic materials are disclosed for use in the production of mouldings having low water permeability and absorption. The materials comprise: (a) 100 parts by weight of a polyolefin rubber; (b) from 15 to 50 parts by weight of a crystalline or partly crystalline polyolefin; (c) from 30 to 140 parts by weight of a carbon black; (d) from 5 to 150 parts by weight of a bitumen or mineral oil; and (e) from 3 to 360 parts by weight of chalk or siliceous chalk.
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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 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.