Zinc phosphorous oxide and zinc arsenic oxide compositions
CA 2103370 A1 · Owner: Exxon Research And Engineering Company · Inventors: Bhalla-Chawla, Meena; Corcoran, Edward William, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Briefly stated this present invention passes a new class of microporous zinc phosphorous oxide and zinc arsenic oxide compositions and method of preparation. The novel compositions have an oxide framework containing zinc and an oxide selected from the group consisting of phosphorous oxides, arsenic oxides and mixtures thereof as the sole lattice constituents; specifically the compositions have the formula: Ma(R4X)b ZnpOq(TO4-e)(OH)eyLf .gH2O (I) where M is selected from the group consisting of H, Li, Na, K, Rb, Cs, Tl Mg, Ca, Sr, Ba, and mixtures, thereof; R is selected from the group consisting of H alky groups, having about 1 to about 8 carbon atoms preferably about 1 to, about 4 carbon …
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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 May 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 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
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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.