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1. (WO1998051435) FULLY-COATED, UNIFORM-SIZED METALLIC PARTICLES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051435 International Application No.: PCT/US1998/009804
Publication Date: 19.11.1998 International Filing Date: 14.05.1998
Chapter 2 Demand Filed: 14.12.1998
IPC:
B01D 21/00 (2006.01) ,B03C 1/01 (2006.01) ,B22F 1/02 (2006.01) ,G01N 33/543 (2006.01) ,H01F 1/09 (2006.01) ,H01F 1/24 (2006.01) ,H01F 1/26 (2006.01) ,H01F 1/44 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
21
Separation of suspended solid particles from liquids by sedimentation
B PERFORMING OPERATIONS; TRANSPORTING
03
SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
C
MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
1
Magnetic separation
005
Pretreatment specially adapted for magnetic separation
01
by addition of magnetic adjuvants
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1
Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
02
comprising coating of the powder
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33
Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
48
Biological material, e.g. blood, urine; Haemocytometers
50
Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
53
Immunoassay; Biospecific binding assay; Materials therefor
543
with an insoluble carrier for immobilising immunochemicals
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
032
of hard-magnetic materials
09
mixtures of metallic and non-metallic particles; metallic particles having oxide skin
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
12
of soft-magnetic materials
14
metals or alloys
20
in the form of particles, e.g. powder
22
pressed, sintered, or bound together
24
the particles being insulated
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
12
of soft-magnetic materials
14
metals or alloys
20
in the form of particles, e.g. powder
22
pressed, sintered, or bound together
24
the particles being insulated
26
by macromolecular organic substances
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
44
of magnetic liquids, e.g. ferrofluids
Applicants:
TANG, Weixin [US/US]; US
WANG, Yuzhou [US/US]; US
Inventors:
TANG, Weixin; US
WANG, Yuzhou; US
Agent:
CASH, Barry, Dale; 217 King Avenue Collingswood, NJ 08108, US
Priority Data:
08/856,49014.05.1997US
Title (EN) FULLY-COATED, UNIFORM-SIZED METALLIC PARTICLES
(FR) PARTICULES METALLIQUES ENTIEREMENT ENROBEES, DE TAILLE UNIFORME
Abstract:
(EN) A novel small size (less than 50$g(m)) metallic particle having a metallic core coated by a rigid inorganic surface protection layer is disclosed. A novel superparamagnetic particle comprising a metal oxide core embedded with a preferably homogeneous inorganic seed, and a rigid inorganic surface protection layer to which a wide variety of molecules may be coupled is also disclosed. Uses of the novel metallic particles and methods for their preparation are also disclosed. The novel metallic particles are chemically, biologically and colloidally stable, and are of highly uniform size dispersion. The metallic particles have a wide variety of applications in systems involving separations steps, in particular the separation of biological materials.
(FR) L'invention concerne une nouvelle particule métallique de taille réduite (moins de 50$g(m)) comportant un noyau métallique enrobé d'une couche de protection de surface inorganique rigide. L'invention concerne également une nouvelle particule superparamagnétique comprenant un noyau d'oxyde métallique noyé avec un germe inorganique de préférence homogène et une couche de protection de surface inorganique rigide à laquelle peuvent être couplées plusieurs molécules. L'invention concerne en outre des utilisations des nouvelles particules métalliques et leurs procédés de préparation. Les nouvelles particules métalliques sont stables du point de vue chimique, biologique et colloïde et présentent une granulométrie hautement uniforme. Les particules métalliques connaissent une grande variété d'applications dans des systèmes comprenant des phases de séparation, notamment la séparation de matières biologiques.
Designated States: AL, AU, BA, BB, BG, BR, CA, CN, CU, CZ, EE, GE, GW, HU, ID, IL, IS, JP, KP, KR, LC, LK, LR, LT, LV, MG, MK, MN, MX, NO, NZ, PL, RO, SG, SI, SK, SL, TR, TT, UA, UZ, VN, YU
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1998076854