You are here

HIGH TEMPERATURE SUPERCONDUCTORS WITH IMPROVED CURRENT DENSITIES

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 9582
Amount: $499,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Timeline
Solicitation Year: N/A
Award Year: 1990
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
Po Box 478
Los Alamos, NM 87544
United States
DUNS: N/A
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Henry L Laquer
 (505) 753-3788
Business Contact
Phone: () -
Research Institution
N/A
Abstract

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

* Information listed above is at the time of submission. *

US Flag An Official Website of the United States Government