Safety locks
CA 2047768 A1 · Owner: Litvin, Noel · Inventors: Litvin, Noel; Litvin, Noel; Scherz, Abraham I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety lock s disclosed of the type applicable to a controlled structure for the alternative activation of electro alarm circuits, door closing and opening mechanisms and other uses. The lock comprises at least one combinatory core formed by a fixed-base body on which a sliding carriage moves as a movable lock between two positions, those of closure and opening respectively. The carriage is locked by the transversal retention of a plurality of through bolts which, working by the action of springs, in the closure position, enter the fixed body through the corresponding perforations which ending, in a common button inherent to the bed of the key slot receive the respective setting bolts …
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 July 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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.