Catalytic hydrodealkylation of aromatics
CA 2036143 C · Owner: Howley, Paul A. · Inventors: Shih, Stuart S.; Howley, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided for hydrodealkylation of alkylaromatic hydrocarbons to produce benzene or BTX over catalyst comprising nickel or a noble metal and a synthetic zeolite, having in its calcined form an, X-ray diffraction pattern including interplanar d-spacings at 12.36 ~ 0.4, 11.03 ~ 0.2 8.83 ~ 0.14, 6.18 ~ 0.12, 6.00 ~ 0.10, 4.06 ~ 0.07 3.91 ~ 0.07 and, 3.42 ~ 0.06 Angstroms.
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 12, 1991 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2013.
- 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.