Rotary drum filter
CA 1164809 A · Owner: Exxon Research And Engineering Company · Inventors: Ryan, Douglas G.; Watridge, Derek J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved rotary filter is described. A baffle means is disposed between the filter drum (20) and the filter cloth (60) in substantial alignment with at least some of the circumferential openings (31) in the filter drum (20) to decrease the erosive effects on the filter cloth (60) of fluid discharged through the circumferential openings (31) in the filter drum (20).
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 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- 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.