Process for controlling environmental pollution from garbage, re-cyclable or not
CA 2089641 C · Owner: Dru, Francoise · Inventors: Dru, Francoise
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Collection units for depositing refuse material (19a) are provided for the public in a manner known per se said units having means of access in the form of an opening (4a). According to the invention said units are provided with: (a) means (4a 25, 26, 27, 28) for identifying, at least roughly a refuse article placed by, or introduced into said opening; (b) means (24) for conveying the refuse article beyond the opening and (c) means (33) for issuing proof of deposit (22a) such as a gift voucher, controlled by said identification means optionally combined with said conveying means.
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 August 20, 1990 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 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.