Removing halogenated hydrocarbons from aqueous media by utilizing a polyolefinic microporous adsorbent
CA 1135680 A · Owner: Celanese Corporation · Inventors: Soehngen, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Halogenated hydrocarbons such as 1,1,1-trichloro-2, 2-, bis(chlorophenyl) ethane (DDT) and polychlorinated biphenyls (PCB), are removed from aqueous media including waste water from chemical manufacturing operations by contacting the aqueous media with an effective amount of a polyolefinic microporous adsorbent, preferably in the form of a filter or cartridge.
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 November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.