Hybrid multiplier tube with ion deflection
CA 2204756 C · Owner: Larue, Ross A. · Inventors: Larue, Ross A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hybrid photomultiplier tube includes a photocathode (130) focusing rings , (134, 136), a photodiode (132) and a collection anode (120) disposed in a detector body (110). A vacuum envelope (116) encloses a vacuum region between the photocathode (130) and the detector (110). Conductors (152 154) disposed , on or adjacent to a sidewall of the vacuum envelope (116) reduce the effect of electrical charges on the sidewall of the vacuum envelope (116) on the trajectories of electrons. An ion deflector electrode (167) is disposed adjacent to the photodiode (132) and extends photocathode operational life and improves noise factor.
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 November 22, 1995 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2017.
- 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.