Field electron emission materials and devices
CA 2336823 A1 · Owner: Printable Field Emitters Limited · Inventors: Tuck, Richard Allan; Bishop, Hugh Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A field electron emission material has a substrate (1700) with an electrically conductive surface. Electron emission sites on the conductive surface each include a layer of electrically insulating material (1703) to define a primary interface region (1702) between the conductive surface and the insulating layer (1703), and a secondary interface region between the insulating layer (1703) and the vacuum environment. Each primary interface region (1702) is treated or created so as to enhance the probability of electron injection from the conductive surface into the insulating layer (1703). Each primary interface region (1702) after such treatment or creation is either an insulator or …
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 July 30, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2021.
- 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.