Cathode/converter
CA 1279938 C · Owner: Marsden, Paul K. · Inventors: Marsden, Paul K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coined cathode/converter for the ionisation chamber of a MWPC photon detector comprising an array of rectangular wells in a layer of lead or lead alloy formed, by spark-erosion machining. The thickness of the walls and floor of each well is so as to maximise the efficiency fo the detector by increasing the surface area to volume ratio of the cathode/converter.
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
- Granted February 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2008.
- 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.