Squid detector for tem prospecting
CA 2132149 C · Owner: The Broken Hill Proprietary Company Limited · Inventors: Dart, David Leslie; Sloggett, Graeme John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A SQUID magnetometer is provided which is capable of improved sensitivity bandwidth dynamic range slew rate and dc field rejection by use of an improved flux-locked loop circuit which includes an independent feedback coil configured to provide a substantially uniform effect on the field over the entire surface of the SQUID chip. This is achieved by providing a cylindrical feedback coil having an internal diameter which is greater than the maximum dimension of the SQUID chip and mounting the coil in close proximity to and co-axially with the SQUID chip.
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 September 15, 1994 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2016.
- 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.