Expired Canadian patentCanada
Contact and adsorber granules
CA 2423174 C · Owner: Lanxess Deutschland Gmbh · Inventors: Schlegel, Andreas
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to fragments or granulates consisting of fine-particle iron oxides and/or , iron oxyhydroxides of any modification with a high specific surface; to methods for producing , them and to their use.
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 September 21, 2001 and granted October 23, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 21, 2001
GrantedOctober 23, 2012
Term endedSeptember 21, 2021
Patent numberCA 2423174 C
Classification (IPC)C02F1/28 +2 more
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.