Scanning tunneling microscope utilizing optical fluorescent for reading
CA 2021582 A1 · Owner: Goldberg, Harris A. · Inventors: Reifenberger, Ronald G.; Goldberg, Harris A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a method for reading information recorded in an information layer comprised of a fluorescent dye. In order to read the recorded information, the tip of a scanning tunneling microscope is passed over the information layer said scanning, tunneling microscope being of sufficient voltage to excite the fluorescent dye material to an excited state. Upon return of the dye material to ground state, fluorescence results. By measuring the fluorescence, or absence thereof, the recorded information can be deciphered.
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 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2012.
- 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.