Compaction of pulverised rubber mixtures
CA 1090970 A · Owner: Bayer Aktiengesellschaft · Inventors: Lehnen, Josef; Koch, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Compacting of a rubber mixture by forcing a vulcanisable mixture of rubber and additives required for its manufacture through a diminishing cross-section. The mixture includes a vulcanising medium and is in the form of a pourable powder having a particle size of 0.1 to 6 mm with a powder density of 0.4 to 0.8 g/cm3. Compacting is at a temperature of 0 to 60°C so that a granular, compact, yet not completely homogeneous mixture of a density of 1.1 to 1.4 g/cm3 is produced. A device for compacting is also shown.
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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 December 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 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.