Pulse forming circuits
CA 2104954 A1 · Owner: Morgan, Carlton B. · Inventors: Yerkovich, Daniel; Maier, Donald C.; Morgan, Carlton B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Circuits for controlling the current flow of an energy pulse as a function of the temperature of a resistive element (10) in the circuit so that the current flow varies over time in accordance with a predetermined waveform. The circuits include at least one negative temperature coefficient thermistor (10) connected between an energy storage device (6) and connectors for delivering energy stored in the storage source (6) to an external load (12). Heat sinks (50) may be attached to the thermistor (10) for cooling the latter so as to increase the rate at which energy pulses may be delivered by the circuits.
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 April 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2014.
- 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.