Active carbon process and composition
CA 1071177 A · Owner: Standard Oil Company · Inventors: O'Grady, Thomas M.; Wennerberg, Arnold N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process is disclosed whereby coal coke or a combination, thereof can be converted in good yield to a very high surface area active carbon with a unique and useful combination of properties which, carbons are particularly useful for water purification. Novel active carbons having a very high surface area which substantially have a cagelike structure exhibiting microporosity are disclosed.
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 February 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 1997.
- 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.