Method for controlling metallophosphate precipitation in high cell density fermentations
CA 2188434 C · Owner: Amgen Inc. · Inventors: Baclaski, Jeffrey Burke; Curless, Craig Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of a phosphate glass as a phosphorous source in the media of high cell density bacterial fermentation processes in order to reduce metallophosphate precipitation reactions. The methods of the invention demonstrate a practical method for controlling levels of metallophosphate precipitation in both the nutrient media and the fermentor which also result in increased cell densities and are useful in a variety of high cell density bacterial fermentation processes.
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 April 27, 1995 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2017.
- 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.