Lever operated lockset having rollback limit stops
CA 2114591 A1 · Owner: Emhart Inc. · Inventors: Norton, George H. Ii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The locking mechanism in a lever operated cylindrical lockset secures the outside operating lever in a fixed position. Angularly spaced apart abutment surfaces on the inner end of the outer rollback engage a part of the locking mechanism in its unlocked condition to prevent excessive angular movement of the outside operating lever and protect the lockset operating mechanism. 16
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 January 31, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2016.
- 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.