Char composition and a method for making a char composition
CA 1070480 A · Owner: Oil Shale Corporation (The) · Inventors: Haberman, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are a composition produced from rubber containing polymeric hydrocarbons and carbon black by pyrolyzing and grinding such rubber with heated balls for a sufficient length of time to vaporize and depolymerize the hydrocarbons and to produce a solid char material having a very fine particle size, said char material being free of nondecomposed rubber and coke and having a benzene discoloration number of greater than 70% and preferably 90% and the related method of making the composition. If the rubber also contains fiberglass and metal the solid material, produced in the pyrolyzing and grinding step will contain fiberglass and metal. The fiberglass and metal are separated from the …
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 January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 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.