Code-operated catch mechanism for latch and bolt of hotel room door
CA 2179819 A1 · Owner: Varma, Shivendra · Inventors: Varma, Shivendra
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controllable catch mechanism is installed in the door frame of hotel room. A pivoting catch engages both a spring-biased latch and a dead-bolt associated with the room door. The state dead-bolt is sensed. An alphanumeric keyboard external to the room allows entry of access codes. If an authorized guest code is entered, a microprocessor-based controller unlocks the catch mechanism regardless of the state of the bolt. The guest code can be changed by the guest, as desired. If a cleaner enters a universal access code, the controller unlocks the catch mechanism only if the bolt is unlocked. Special override codes are provided that unlock the catch mechanism regardless whether the bolt is …
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 December 23, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 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.