Process for the treatment of waste water
CA 1105159 A · Owner: Hoechst Aktiengesellschaft · Inventors: Ringel, Erich; Albers, Arnold; Elinkmann, Hans-Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure:, Industrial waste waters contain frequently organic components which slow down or hinder a biological decomposition. However, after treating the waste waters with nitric acid or nitrates at elevated temperature the, residual organic impurities may be readily removed by biological degradation.
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 July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
- 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.