Interstitial x-ray needle
CA 2090210 C · Owner: Muehlenweg, Carl Allan · Inventors: Muehlenweg, Carl Allan; Miller, Robert Bruce; Smith, John Rudolph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interstitial X-ray needle includes an elongated X-ray tube coupled to an electron emitter at one end of the tube with a converter element being dis-, posed at a tip of the other end of the tube for converting emitted electrons into X-, rays; a solenoid coil wound around the tube for providing a magnetic field that, confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and a pipe coaxially disposed between the casing and, the tube for defining an inner annular flow chamber between the tip of the tube, and a coolant inlet in the casing and an outer annular flow chamber between the, tip of the tube and a coolant outlet in the casing.
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 February 23, 1993 and granted July 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.