Transparent polycrystalline garnets
CA 2042263 A1 · Owner: O'Clair, Chester R. · Inventors: O'Clair, Chester R.; Gurmen, Erdogan O.; Minnear, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RD-20,202, TRANSPARENT POLYCRYSTALLINE GARNETS Abstract of the Disclosure, Transparent polycrystalline garnet bodies having, desirable properties for use as laser material luminescent, x-ray scintillator materials and other uses are produced by mixing a chloride source solution of the desired cations with a basic ammonium solution to produce a precipitate having a substantially uniform composition which can be further processed to provide the desired transparent body. This precipitate is separated from the solution dried, thermally, decomposed at a temperature in the range from 700 to 1,000°C pressed to form a compact, isostatically pressed at up to 60,000 psi to provide a green, unsintered …
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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 9, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 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.