Method of and apparatus for disposing of cooling units
CA 2032397 C · Owner: Walter, Alfred · Inventors: Walter, Hermann-Josef; Welter, Hubert; Walter, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Useless refrigerators or other, commodities which contain or consist of polyurethane foam wherein the cells confine fluorochlorohydrocarbon gas are relieved of refrigerant and lubricant prior to being comminuted into 1 cm3 cubes or similar particles. The particles are classified in a suction chamber to segregate comminuted foam from metallic and/or plastic materials and the, particles of foam are thereupon ground and/or otherwise pulverized to a size in the range of 0.1 mm. This destroys the cells and releases the gas which is filtered, condensed and mixed with water prior to confinement in vessels. Pulverized foam is collected in bags.
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
- Filed December 17, 1990 and granted January 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2012.
- 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.