Arrangement and reference means to direct a beam in radiation therapy
CA 2283317 C · Owner: Lofroth, Per-Olov · Inventors: Bergstrom, Per; Widmark, Anders; Lofroth, Per-Olov
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns an arrangement and a reference method for the precision aiming of a radiation beam for treating an internal cancer tumour in a patient. The method of treatment includes that least one reference marker introduced into the patient in a defined position in relation to the cancer tumour, whose geometry is determined and the treatment planned in relation to the reference marker by means of computer tomography/tomography that the , patient is by known means brought into position for the treatment that a , defined point in the cross section of the beam is defined by a sight that the , patient with at least one said reference marker in the said defined position …
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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 March 17, 1998 and granted March 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2020.
- 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
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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.