A fluorescent lamp having an attachment therein for reduction of soluble mercury in the lamp and to act as a fail-safe at the end of lamp life
CA 2241693 A1 · Owner: Shinn, Dennis B. · Inventors: Shinn, Dennis B.; Tuttle, Billy W.; Boyce, Craig S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluorescent lamp having an attachment mounted therein for reduction of soluble mercury contained in the lamp and to act as, a fail-safe at the end of lamp life comprises a collar of iron, mesh providing an iron surface area sufficiently large to reduce a portion of the soluble mercury to elemental mercury when the lamp is pulverized to granules and subjected to a suitable aqueous acid solution, such that a remaining portion of soluble mercury leachable is less than 0.2 milligram per liter of the aqueous acid solution, whereby to provide a substantially non-soluble mercury leachable lamp. The attachment is adapted for disposition around an electrode mount in the lamp and is electrically …
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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 June 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2020.
- 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.