X-ray and electron radiotherapy clinical treatment machine
CA 1262972 C · Owner: Nunan, Craig S. · Inventors: Nunan, Craig S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
X-Ray and Electron Radiotherapy Clinical Treatment Machine, A radiotherapy machine includes a microwave powered accelerator 102 to produce an energetic beam 100 of charged particles, bending and focussing magnets 104, 108, 110, 112, 114 to scan the beam in a plane and collimators 120 to make the resulting scanned beam into parallel rays of charged particles or x-rays. The beam is intensity modulated as it is scanned to control dosage. The subject is moved perpendicular to the scanning plane in order to treat a 3-dimensional shape.
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
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.