Catalytic cracking catalysts and additives
CA 2094889 C · Owner: Ritter, Ronald Eric · Inventors: Schaeffer, Howard John, Iii; Kumar, Ranjit; Ritter, Ronald Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalytic cracking catalysts/additives which comprise rare-earth, preferably lanthanum oxide, and/or oxychloride dispersed in an acid reacted metakaolin matrix. The catalysts/additives may be combined with zeolite-containing cracking catalysts to enhance catalytic activity/selectiyity in the presence of metals (Ni and V).
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 April 26, 1993 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2015.
- 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.