Method and apparatus for conversion of doorknob lock sets
CA 2000325 A1 · Owner: Campion, Neil P. · Inventors: Novak, Richard P.; Foty, Michael J.; Campion, Neil P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of coverting a conventional lock set to one having a universal knob/handle thereon. A variety of universal knobs can be provided, each specifically or specially adapted to receive a particular type or style of lock core or lock cylinder arrangement therein. Consequently through the provision of a universal knob for each manufacturer's lock cylinder, substantially any hardware assembly of any manufacture can be converted or adapted, such that the key operated knob or knobs will operate by means of a lock cylinder assembly of any style or manufacture.
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 10, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2011.
- 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.