Global Patent Index - EP 1051715 A1

EP 1051715 A1 2000-11-15 - MAGNETIC LIQUID AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF

Title (en)

MAGNETIC LIQUID AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF

Title (de)

MAGNETISCHE FLÜSSIGKEIT UND VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG

Title (fr)

LIQUIDE MAGNETIQUE ET PROCEDE ET DISPOSITIF PERMETTANT DE LE PREPARER

Publication

EP 1051715 A1 (DE)

Application

EP 98965839 A

Priority

  • DE 19758350 A
  • EP 9808232 W

Abstract (en)

[origin: DE19758350C1] The invention relates to a novel magnetic liquid and to a method and device for the production thereof. The aim of the invention is to produce a magnetic liquid which is based on a polar carrier liquid having a high saturation magnetization, i.e. having a high concentration of nanometer particles and a low viscosity, and to provide a method and device for the production thereof. To this end, a magnetic liquid is provided which comprises a saturation magnetization of at least 30 mT and a viscosity under 100 mPas at 40 DEG C, whereby the carrier liquid contains essentially no dissolved components of the outer adsorption layer. In addition, a method and device are provided for the production thereof.

IPC 1-7 (main, further and additional classification)

H01F 1/44; B03C 1/32

IPC 8 full level (invention and additional information)

H01F 1/34 (2006.01); B03C 1/32 (2006.01); H01F 1/44 (2006.01)

CPC (invention and additional information)

B03C 1/32 (2013.01); H01F 1/44 (2013.01)

Citation (search report)

See references of WO 9933072A1

Designated contracting state (EPC)

AT BE CH FR GB IT LI NL

EPO simple patent family

DE 19758350 C1 19990311; AU 2162299 A 19990712; CA 2315704 A1 19990701; CN 1285950 A 20010228; EP 1051715 A1 20001115; JP 2001527283 A 20011225; RU 2203516 C2 20030427; WO 9933072 A1 19990701

INPADOC legal status


2004-01-21 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030717

2002-04-24 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020307

2000-11-15 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000718

2000-11-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH FR GB IT LI NL