Poly(potassium and sodium styrene sulfonate), its manufacture and its uses
CA 2492211 A1 · Owner: Katti, Sanjeev S. · Inventors: Katti, Sanjeev S.; Bhagat, Hitesh R.; Chancellor-Adams, Toni G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibiotic-associated diarrhea, such as that caused by Clostridium difficile represents a serious medical complication that can result from administering a broad~spectrum antibiotic to a subject. Such diarrhea leads to significant potassium loss from the subject. The present invention discloses a polymeric therapeutic agent that treats antibiotic-associated diarrhea and is physiologically potassium neutral. This polymer contains polystyrene sodium sulfonate and polystyrene potassium sulfonate repeat units.
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 July 18, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2025.
- 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.