Unitary self shielded, self filtered and flattened bremsstrahlung photon source assembly for radiotherapy use
CA 1102018 A · Owner: Atomic Energy Of Canada Limited - Energie Atomique Du Canada, Limitee · Inventors: Brown, Peter W.A.; Brown, William R.; Mchugh, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photon source filter and primary collimator arrangement wherein the source and filter are within the boundaries of the primary collimator and together form a unitary assembly which may be fixed relative to the impinging electron beam or may be removable from the same. The assembly may consist of low and high atomic number elements or compounds.
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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
- Granted May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 1998.
- 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.