Control of leachable mercury in small diameter fluorescent lamps
CA 2423776 A1 · Owner: Klinedinst, Keith A. · Inventors: Shinn, Dennis B.; Klinedinst, Keith A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for inhibiting the leaching of mercury from a mercury vapor discharge lamp, having a diameter of less than 1.5 inches wherein at least a part of the mercury is present as, ionic mercury includes depositing a coating of SnO2 on an interior surface of the lamp, envelope. Further included within the lamp is a quantity of oxidizable iron in an amount, equal to at least 1 gram per kilogram of lamp weight.
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 March 28, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2025.
- 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.