Method for the disposal of nickel-cadmium or nickel-hydride cells
CA 2105373 C · Owner: Inter-Recycling Ag · Inventors: Alavi, Kamal; Salami, Bahman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Waste material, consisting of collected nickel-cadmium or nickel-hydride cells, after a preliminary reduction in size (1) is, subjected to a subsequent grinding reduction in size (2) and is then screened. The screen coarse fraction (G) is separated into a light fraction (L) and a heavy fraction (H) by means of an air separation (4), and the later fraction (H) is magnetically separated. The light fraction (L) and the non-magnetic portion (HN) are dried (6) and screened (7) in order to free the non-metallic components (P,PPW) from the predominantly metallic fine portion (S) and so that they can be divided out as a harmless product. The magnetic portion (HM) is mechanically scoured (8) and …
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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
- Filed September 1, 1993 and granted April 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2015.
- 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.