Reclaimed vulcanised rubber
CA 1052063 A · Owner: Setech International Limited · Inventors: Sear, Derek W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vulcanised rubber is reclaimed by treating pieces of the rubber to render a surface layer of each piece plastic while the inner core of the piece remains nonplastic. A chemical reagent can be used in the treatment but it is preferred to render the surface layers of the rubber pieces plastic by a heat treatment which involves direct exposure of the pieces of rubber to either a flame or a heated gas. In a preferred embodiment of the invention vulcanised rubber pieces are dropped under gravity into a flame so that any attached textile residues are burnt away simultaneously with the plasticising of the surface layers of the pieces and the heated pieces then enter a stream of cold air which …
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 April 10, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 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.