(19)

(11)

EP 0 992 095 A1

(12)

(43) Date of publication: 12.04.2000 Bulletin 2000/15 (21) Application number: 97928907.1 (22) Date of filing: 06.06.1997

(51) International Patent Classification (IPC)7: H01S 3/30 (86) International application number: PCT/US9709/948 (87) International publication number: WO 9747/062 (11.12.1997 Gazette 1997/53)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 06.06.1996 US 19337 P (71) Applicant: COLORADO STATE UNIVERSITY RESEARCH FOUNDATION Fort Collins, CO 80522 (US)	(72) Inventors: ROCCA, Jorge Fort Collins, CO 80525 (US) BENWARE, Brady, R. Fort Collins, CO 80521 (US) MORENO, Cesar, H. Fort Collins, CO 80523 (US) (74) Representative: Evens, Paul Jonathan  Maguire & Co.,5 Crown Street St. Ives,Cambridge PE17 4EB St. Ives,Cambridge PE17 4EB (GB)