Electronic trip device with short delay function
CA 2047658 A1 · Owner: Merlin Gerin · Inventors: Levain, Marc; Fraisse, Didier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The short time delay circuit comprises a counter (4) which is zero reset when the signal (I) representative of the current is greater than or equal to a threshold (Is) and controls (A2), count-down of an up-down counter (5) when the content of the, counter reaches a preset value. A clock circuit (6) controls the count-up and count-down frequency of the counter (4) and up-down counter (5). Refer to figure 1.
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 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 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.