Inhomogeneous silicas as carrier material
CA 2376843 A1 · Owner: Degussa Ag · Inventors: Uhrlandt, Stefan; Schmoll, Ralf; Drexel, Claus-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a composition of inhomogeneous silicas comprising of at least two silica fractions; wherein the silica of the invention has a specified range of BET surface area; CTAB surface area and DBP absorption data. The silica can be used as carrier material or as support for catalytically active substances. Disclosed further is a process for the preparation of novel silica compositions.
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 March 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2024.
- 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.