Negative absolute conductance device and method
CA 2107067 C · Owner: Mickevicius, Rimvydas · Inventors: Dutta, Mitra; Stroscio, Michael A.; Mickevicius, Rimvydas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed generally herein is a quantum wire embedded in another material or a quantum wire which is free standing. The quantum wire structure is fabricated such that a quantum well semiconductor material, e.g. Gallium Arsenide (GaAS) is embedded, in a quantum barrier semiconductor material e.g. Aluminum, Arsenide (AlAs). Preferably the entire quantum wire structure, is engineered to form multiple subbands and is limited to a low dimensional quantum structure having dimensions around 150x250 .ANG.. This structure has a negative absolute conductance at a predetermined voltage and temperature. Due to resonant behaviour of the density of states, the rates of electron scattering in the passive …
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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 27, 1993 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2015.
- 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
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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.