Periodic permanent magnet structures
CA 2000757 C · Owner: Leupold, Herbert A. · Inventors: Leupold, Herbert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Periodic permanent magnet structures comprise a plurality of azimuthally circumscribed sections of hollow spherical flux sources such that each flat face of said sections abuts one or more superconducting planar sheets. The superconducting sheets act as magnetic mirrors to complete the magnetic image of the sections. This produces a uniform high field in the central cavity(s). Each spherical section has an axial bore hole through its magnetic poles. The flux sources are arranged tangent to each other with the bore holes coaxially aligned to form a continuous channel through which charges particles may travel.
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 October 16, 1989 and granted July 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.