Highly active zsm-5 zeolite and process for producing the same
CA 2132902 A1 · Owner: Terada, Kazuhide · Inventors: Fukuda, Kaoru; Shimizu, Haruhiko; Terada, Kazuhide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A highly active ZSM-5 zeolite has an irregular ZSM-5 type crystal structure depleted of some of forming elements in a lowly active ZSM-5 zeolite having a regular ZSM-5 type crystal structure. The single-lattice volume V1 determined from crystal lattice constants by an X-ray diffraction for the irregular ZSM-5 crystal structure is in a relationship of V1 < V2 with a single-lattice volume V2 determined from crystal lattice constants by an X-ray diffraction for the regular ZSM-5 crystal structure. This is attributable to the fact that a relationship of .beta. > .alpha. is established between Si-O-Si bond angles .alpha. and .beta. in the regular and irregular ZSM-5 type crystal structures. Such …
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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 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2016.
- 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.