A control system for neurosurgical electrosurgical unit
CA 2220904 C · Owner: Eggleston, Jeffrey L. · Inventors: Eggleston, Jeffrey L.; Orszulak, James H.; Sodnicar, Matthew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system (10) and method for the operation of neurosurgical bipolar electrodes (11) provides a source of high frequency energy (13') connected to bipolar electrodes (11). Contacting surfaces are on the bipolar electrodes (11) of highly electrically conductive material. A current transducer attached to the source of high frequency energy (13') measures (20) the RMS current applied between the contact surfaces (25). A current transducer attached to the source of high frequency energy (13') provides a signal (26) correlated to the instantaneous values of the RMS voltage between the contacts. A control connects to the source of high frequency energy (13') for initially …
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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 June 3, 1996 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2018.
- 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.