Extract of bacterial macromolecules, a process for its preparation and a pharmaceutical composition containing the same
CA 2106854 A1 · Owner: Laboratoires Om Sa · Inventors: Bauer, Jacques; Hirt, Pierre; Schulthess, Adrian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modified bacterial protein-based extract comprising a mixture of acidic bacterial polyanions having a molecular weight of 10,000-1,000,000 and an isoelectric point of 2.5-5.5 wherein the sum, of the constituent amino acids represents at least 50 wt % of said extract. Said protein extract is prepared by cultivating bacteria in an aqueous medium, subjecting the bacterial suspension to alkaline extraction and purifying the protein extract. Alkaline extraction is performed in the presence of a dilute aqueous source of OH- ions and at a pH of 11-13, with the pH decrease during said extraction being no greater than 0.4. The resulting protein extract may be used as an active ingredient in a …
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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
- Filed February 3, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2015.
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Timeline
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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.