Removal of bacteria
CA 1100241 A · Owner: Rohm And Haas Company · Inventors: Slejko, Frank L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
U. S. SERIAL NO. 854,306 Filed Nov. 23 1977, Dkt. No. REMOVAL OF BACTERIA, 77-47 Abstract, This invention relates to an ion exchange column for the removal of bacteria from a liquid medium wherein the column has, as an indicator to indicate when the column capacity for removal of bacteria is exhausted a filter having, submicron pores which will become plugged after a short period of usage with an exhausted bacteria-removing ion exchange column so that pressure build up will noticeably reduce the flow of liquid exiting from the filter thereby indicating to the user that the ion exchange column is exhausted. This invention also relates to a process for removing bacteria from a liquid medium …
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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 April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- 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.