Reclamation process for sewage scum
CA 1181416 A · Owner: Gill, Jagroop S. · Inventors: Gill, Jagroop S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a recovery of fatty acids from sewage scum and the subsequent upgrading of the fatty acids as a processed oil. This upgrading is achieved through vacuum distillation and de-odorization. This invention relates to a process of recovery purification and utilization, of brown sewage scum or skimmings which heretofore has been a nuisance waste. In a first step the scum is run through a heat process and a series of filters. Entrained water and other foreign solids are removed. The oily product that solidifies on cooling is found to contain more than 70% of a mixture of fatty acids. This processed oil, in a crude form has utility as a wax replacement in fuel logs. The …
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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 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2002.
- 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.