Fe-containing zeolite kl
CA 2103584 C · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Verduijn, Johannes P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The crystal size and shape of zeolite KL can be improved by forming the zeolite from a synthesis mixture in which the molar ratio of K2O/SiO2 is 0.18 to 0.36, and in which the synthesis mixture comprises iron preferably in an amount such that the molar ratio of Fe/Al2O3 is at least 0.015.
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 February 4, 1992 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2014.
- 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.