Granular activated carbon manufacture from low tank bituminous coal leached with dilute inorganic acid
CA 1074768 A · Owner: Murty, Hari N. · Inventors: Murty, Hari N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
ACl-3, GRANULAR ACTIVATED CARBON MANUFACTURE FROM LOW RANK BITUMINOUS COAL LEACHED WITH DILUTE INORGANIC ACID Abstract of the Disclosure, Granular activated carbon is manufactured from low rank bituminous coal by crushing and screening the as received coal to produce 8/30 mesh granules, which are treated by leaching with a dilute aqueous solution of inorganic acid (H2SO4 H3P04, or HCl) at a concentration of about 13% by weight and at an aqueous solution to coal ratio of about 10/1 by weight by, washing off the acid, by drying thoroughly and by mixing with about 10% by weight of coal tar pitch. The so treated granules are ground to at least 65% by weight -325 mesh powder which is compressed …
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 April 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 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.