Lighting fixture assembly
CA 2054352 C · Owner: Baker, Ronald A. · Inventors: Stringer, Ralph S.; Baker, Ronald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lighting fixture assembly having a plaster plate and a tubular lamp housing for installing a recessed light into a ceiling. The plaster plate has a blank portion removed to form a lamp housing receiving aperture. The tubular lamp housing has a tubular sidewall an open bottom, end aligned with the lamp housing aperture in the plaster plate and a closed top end, which is formed by the blank portion removed from the plaster plate to form the lamp housing receiving aperture. Preferably the tubular lamp, housing is substantially cylindrical with the sidewall tapering slightly inwardly and upwardly from its open bottom end to its closed top end.
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 October 28, 1991 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.