Title (en)

Developer compositions.

Title (de)

Entwickelzusammensetzungen.

Title (fr)

Compositions de développateur.

Publication

EP 0532320 A1 19930317 (EN)

Application

EP 92308236 A 19920910

Priority

US 75710691 A 19910910

Abstract (en)

A developer composition comprised of a toner comprised of resin, carbon black, magnetite, and a positive charge enhancing additive, and a surface additive mixture comprised of a polymeric hydroxy compound and a colloidal silica treated with a quaternary ammonium salt compound; and carrier particles comprised of a ferrite core with a polymer mixture coating thereover.

IPC 1-7

G03G 9/087; G03G 9/097

IPC 8 full level

G03G 9/09 (2006.01); G03G 9/08 (2006.01); G03G 9/083 (2006.01); G03G 9/087 (2006.01); G03G 9/097 (2006.01); G03G 9/113 (2006.01)

CPC (source: EP)

G03G 9/08782 (2013.01); G03G 9/09716 (2013.01)

Citation (search report)

• [YD] EP 0276147 A2 19880727 - XEROX CORP [US]
• [Y] US 4971882 A 19901120 - JUGLE DON B [US]
• [Y] DE 3836388 A1 19890524 - KONISHIROKU PHOTO IND [JP]
• [Y] EP 0378181 A2 19900718 - KONISHIROKU PHOTO IND [JP]
• [Y] US 4965158 A 19901023 - GRUBER ROBERT J [US], et al
• [Y] US 4859550 A 19890822 - GRUBER ROBERT J [US], et al
• [A] US 4912005 A 19900327 - GOODMAN DONALD J [US], et al
• [A] EP 0034423 A1 19810826 - XEROX CORP [US]

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0532320 A1 19930317; EP 0532320 B1 19961211; CA 2076847 A1 19930311; CA 2076847 C 20010619; DE 69215806 D1 19970123; DE 69215806 T2 19970612; JP H05197194 A 19930806; JP H0769630 B2 19950731

DOCDB simple family (application)

EP 92308236 A 19920910; CA 2076847 A 19920825; DE 69215806 T 19920910; JP 23371292 A 19920901