Electrosurgical bipolar cutting handpiece
CA 2130554 C · Owner: Sherwood Services Ag · Inventors: Klicek, Michael S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrosurgical bipolar cutting apparatus comprising a handpiece (1) to which is connected a first active electrode and a second return electrode having exposed distal ends (6 7) which define a tip for electrosurgically cutting tissue at an operational site on a patient, which tip is structured so that both distal ends simultaneously contact said tissue and wherein the active electrode has a higher tissue to electrode impedance than the return electrode.
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 January 11, 1993 and granted March 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2015.
- 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.