Hole-trap-compensated scintillator material
CA 2042147 A1 · Owner: General Electric Company · Inventors: Tsoukala, Veneta G.; Greskovich, Charles D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RD-20,194, HOLE-TRAP-COMPENSATED SCINTILLATOR MATERIAL, Abstract of the Disclosure, Afterglow in a luminescent material in which a significant factor in afterglow is the release of holes from hole traps in the scintillator material is substantially reduced by adding a hole-trapping species to the scintillator composition which successfully competes with the hole traps in the basic scintillator composition. In gadolinium gallium garnet activated with chromium, the addition of cerium terbium or praseodymium reduces afterglow in this manner.
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 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.