Microscreen drum
CA 1083974 A · Owner: Envirex, Inc. · Inventors: Saffran, Edward P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification discloses an improvement in rotary drum screens for the filtration of liquids which comprises (a) a drum having a central horizontal axis and a radially outer surface, (b) a plurality of microscreen grids mounted on the radially outer surface of the drum each of the, microscreen grids comprising a microscreen which is divided into a large number of small cells by walls which extend radially with respect to the drum, (c) means for introducing liquid to be filtered into the interior of the drum (d) means, for rotating the drum about its central axis (e) a backwash, header mounted outside the radially outer surface of the drum and (f) a backwash receiving trough mounted …
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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 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.