(19)
(11) EP 0 183 704 A1

(12)

(43) Date of publication:
11.06.1986 Bulletin 1986/24

(21) Application number: 85901272.0

(22) Date of filing: 25.02.1985
(51) International Patent Classification (IPC): 
C09K 11/ 77( . )
 C09K 11/ 84( . )
(86) International application number:
PCT/US1985/000306
(87) International publication number:
WO 1985/004179 (26.09.1985 Gazette 1985/21)
(84) Designated Contracting States:
DE FR GB NL SE

(30) Priority: 12.03.1984 US 19840588257

(71) Applicant: Hughes Aircraft Company
Los Angeles, California 90045-0066 (US)

(72) Inventor:
  • GRITZ, Edward, E.
    Carlsbad, CA 92008 (US)

   


(54) GASEOUS REACTIVE IMPROVEMENT TREATMENT SYSTEM OF PARTICULATE RARE EARTH OXYSULFIDE PHOSPHORS