Apparatus and process for removal of pollutants from waste water
CA 2133980 C · Owner: Alliedsignal Inc. · Inventors: Defilippi, Louis J.; Mashayekhi, Mansour; Hribik, Walter F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a bioremediation process for pollutants. The present process utilizes an adsorbent coated biologically active support for use in biological remediation processes for pollutants, for example, in industrial and municipal waste waters and by-products, and to a bioreactor comprising the biologically active support.
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 May 4, 1993 and granted June 24, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 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.