Blade for cutting cylindrical structures
CA 2048780 C · Owner: General Electric Canada Inc. · Inventors: Schartinger, Edward Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blade for cutting cylindrical structures is disclosed. The working face of the blade is adapted for piercing and cutting. The blade of the invention works to cut cylindrical structures without substantially deforming the wall of the structure adjacent to the cut. The blade may be of use in a variety of devices for cutting cylindrical structures.
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 August 8, 1991 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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.