Culture fluid concentrator
CA 2000733 A1 · Owner: Takahashi, Masahiko · Inventors: Takahashi, Masahiko; Kumazawa, Eitaro; Ishida, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided between a concentrate tank and a membrane filter a circulating line which consists of a feed line and a return line. It is also possible to use an ultrafilter as the membrane filter. There is provided a sight glass connected by respective pipes to the concentrate tank at top and bottom portions thereof, respectively. A float floats within the sight glass and the position of this float is detected by means of the transparency of the sight glass itself or photosensors in order to detect the degree of concentration of the culture fluid within the concentrate tank. There may be provided multi-stage circulating lines each connecting an associated concentrate tank to an …
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 October 16, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2011.
- 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.