System and method for increasing the efficiency of a cyclotron
CA 2087188 C · Owner: Siemens Medical Solutions Usa, Inc · Inventors: Hendry, George Orr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a negative hydrogen (H ) ion cyclotron a, system and method for improving the efficiency of the cyclotron by minimizing loss, i.e. neutralization of H- ions within the acceleration region of the cyclotron caused by gas stripping. The system includes a cyclotron volume, an ion source within the ion source volume is maintained at a negative potential and located proximate the cyclotron center on the plane of acceleration. The vacuum system includes a main vacuum pump for evacuating the cyclotron volume and an ion source pump for separately evacuating the ion source volume to remove hydrogen (H2) gas molecules which could cause gas stripping if injected into the cyclotron volume.
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 May 8, 1992 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2014.
- 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.