Method of recovering glass cullet
CA 1067874 A · Owner: Ford Motor Company Of Canada · Inventors: Gurta, Daniel J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of recovering cullet from laminated glass scrap is disclosed. The laminated scrap is crushed to fragment the glass but the glass generally remains in bonding contact with the laminating interlayer. The crushed scrap is mixed as its temperature is increased so that the laminating interlayer softens to permit the interlayer to be torn thus reducing the size of the scrap. The finally divided scrap is heated to a temperature at which the interlayer burns away. Any carbon residue left on the crushed scrap is also burned away. The crushed scrap is cooled and recovered as cullet.
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 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 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.