Process for the production of thermophilic microorganisms in high yield
CA 2115163 A1 · Owner: Ladwa, Narendra M. · Inventors: Raven, Neil D.; Sharp, Richard J.; Ladwa, Narendra M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for growth of thermophilic bacteria in essentially elemental-sulphur free medium at cell densities of 1 x 109 ml-1 and above. Growth is under steady state conditions with continuous introduction into the medium of an inert gas to remove hydrogen and/or hydrogen sulphide. The process can be carried out in a gas lift reactor.
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 August 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2014.
- 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.