Degritting and fiber removal with cyclone and filter
CA 1069444 A · Owner: Dorr-Oliver Incorporated · Inventors: Bier, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Degritting and Fiber Removal with Cyclone and Filter. ABSTRACT OF THE DISCLOSURE Apparatus and process for removing grit and fiber from waste activated sewage sludge prior to introduction into a centrifuge for further separation. Grit removal is accomplished by hydrocyclones and fiber removal is carried out on a 300° screen. The hydrocyclones and screen, together with connecting conduits are conveniently mounted on a, supporting frame for facilitating transportation of the unit and for maintaining the predetermined structural relationships of the various members.
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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 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.