Monday, October 09, 2006

Top Ten Broadest US Patents for Electrical Applications of Nanotechnology

The following is based on a review of 880 US patents classified by the USPTO as related to electrical applications of nanotechnology. The listed patents are based on the claim breadth and are not necessarily indicative of technical importance or economic value.

1. US Patent 6818821 - Hitachi, priority - Feb.15, 2002

Claim 1 - " Electromagnetic wave absorption material comprising a multi-layer hollow globule of carbon."

2. Reissued US Patent RE 38561 - Till Keesman, priority - Aug. 23, 1996

Claim 10 - "A field emission cathode comprising an electron-emitting part of the cathode formed at least in part as a carbon nano-cylinder."

3. US Patent 6928042 - Hewlett Packard, priority - July 6, 2001

Claim 1 - "A data storage device comprising an array of nanotubes as electron sources; and a phase-change storage layer proximate tips of the electron sources."

4. US Patent 6969504 - Rice University, priority - Sept. 8, 1995

Claim 1 - "An electrical conductor comprising single-wall carbon nanotubes, wherein at least 10% of the single-wall carbon nanotubes in the electrical conductor are armchair single-wall carbon nanotubes."

5. US Patent 6921575 - Fuji Xerox, priority - May 21, 2001

Claim 1 - "A device, which comprises two or more carbon nanotube structure layers comprising carbon nanotube structures in which a network is formed by plural carbon nanotubes intercrossed."

6. US Patent 6239547 - Ise Electronics Corporation, priority - Sept. 30, 1997

Claim 1 - "An electron-emitting source comprising: a carbon nanotube formed from a columnar graphite layer formed from a multilayer graphite column whose tip is open. "

7. US Patent 6798127 - Nano Proprietary, Inc., priority - Oct. 9, 2002

Claim 1 - "A field emission cathode comprising: a) a substrate; and b) a field emission cathode material comprising a mixture of carbon nanotubes and particles. "

8. US Patent 6486597 - N.V. Bekaert S.A., priority - May 9, 1997

Claim 1 - "An electrical device comprising a substrate and coating, said coating comprising carbon and silicon, and having a secondary electron emission coefficient less than about one."

9. US Patent 6919730 - Honeywell International, Inc., priority - Mar. 18, 2002

Claim 1 - "An IR sensor comprising: a plurality of carbon nanotubes; and a temperature sensor positioned proximate the nanotubes for detecting heating caused by IR radiation falling on the nanotubes."

10. US Patent 5260957 - The Charles Stark Draper Laboratory, Inc., priority-Oct. 29, 1992

Claim 1 - "A quantum dot laser comprising: a laser host material; a plurality of quantum dots disposed in said host material; and a pumping source for exciting a population inversion in said quantum dots."