Lock deadbolt protector
CA 1297688 C · Owner: Yale Security Inc. · Inventors: Cudd, Charles A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mortise lock has a guardbolt which, when depressed moves, a hooked lever inside the lock housing from a first position in which it blocks operation of the deadbolt operator to a second, position in which it clears the deadbolt operator and permits it to operate. This protects against extension of the deadbolt unless the door is closed.
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
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.