Expired Canadian patentCanada
Double cylinder deadbolt
CA 2116643 C · Owner: Newfrey Llc · Inventors: Ellis, Philip C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double cylinder tubular deadbolt lock having the inside cylinder provided with a removeable cap or cover which covers the exposed screws in the flanged face of the inside cylinder.
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 February 28, 1994 and granted June 1, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.
FiledFebruary 28, 1994
GrantedJune 1, 1999
Term endedFebruary 28, 2014
Patent numberCA 2116643 C
Classification (IPC)E05B9/00 +2 more
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.