Multistage membrane control system and process
CA 2111554 A1 · Owner: Thompson, David R. · Inventors: Thompson, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention relates to the control of multistage fluid separation processes and systems. The processes and systems employ at least one recycle compressor or pump means in conjunction with their associated controlling means to separate a fluid mixture in an efficient manner during off demand or turndown conditions. The operation of at least one recycle compressor or pump means is controlled so as to maintain the pressure in the permeate side or sides at a set value, thus maintaining the desired pressure ratio across the multistage membrane and obtain the desired, reduced power consumption during off demand or turn-down conditions.
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
- Filed December 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2015.
- 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.