(19)
(11) EP 0 429 557 A1

(12)

(43) Date of publication:
05.06.1991 Bulletin 1991/23

(21) Application number: 90902739.0

(22) Date of filing: 27.12.1989
(51) International Patent Classification (IPC): 
C01B 31/ 30( . )
C01B 31/ 36( . )
(86) International application number:
PCT/US1989/005871
(87) International publication number:
WO 1990/008102 (26.07.1990 Gazette 1990/17)
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 11.01.1989 US 19890295682

(71) Applicant: THE DOW CHEMICAL COMPANY
Midland, Michigan 48640 (US)

(72) Inventor:
  • MOORE, William, G.
    Midland, MI 48640 (US)

(74) Representative: Sternagel, Hans-Günther, Dr., et al 
Patentanwälte Dr. Michael Hann Dr. H.-G. Sternagel Sander Aue 30
D-51465 Bergisch Gladbach
D-51465 Bergisch Gladbach (DE)

   


(54) METHOD AND APPARATUS FOR PRODUCING BORON CARBIDE CRYSTALS