US5403375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine-particle metal powders
Assignee: H.C. Starck GmbH
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Filing: 1993-04-27
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Granted: 1995-04-04
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Expires: 2013-04-27
Abstract
Abstract This invention relates to fine-particle powders of the metals Fe, Co, Ni, W and/or Mo which have a defined particle size of 1.0 nm to less than 1 00 nm. Less than 1% of the individual particles of the powder deviate by more than 40% from the average particle size, and no individual particle of the powder deviates by more than 60% from the average particle size.
Inventors
- 👤 Theo Konig
- 👤 Dietmar Fister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:47
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/28; B22F1/00; B22F1/05; B22F1/052; B22F1/054; B82; B82Y; B82Y30/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
72 words
Fine-particle powders of at least one metal selected from the group consisting of Fe, Co, Ni, W and Mo which have an average particle size of from 1.0 nm to less than 100 nm, wherein less than 1% of the individual particles deviate by more than 40% from the average particle size of said powders and no individual particles deviate by more than 60% from the average particle size of said powders.
Claim 2
Dependent Claim
72 words
Fine-particle powders of at least one metal selected from the group consisting of Fe, Co, Ni, W and Mo which have an average particle size of from 1.0 nm to less than 100 nm, wherein less than 1% of the individual particles deviate by more than 40% from the average particle size of said powders and no individual particles deviate by more than 60% from the average particle size of said powders.
Claim 3
Dependent Claim
45 words
Metal powders as claimed in claim 1, wherein less than 1% of the individual particles deviate by more than 20% from the average particle size of said powders and no individual particles deviate by more than 50% from the average particle size of said powders.
Claim 4
Dependent Claim
45 words
Metal powders as claimed in claim 2, wherein less than 1% of the individual particles deviate by more than 10% from the average particle size of said powders and no individual particles deviate by more than 40% from the average particle size of said powders.
Claim 5
Dependent Claim
23 words
Metal powders as claimed in claim 2, wherein the average particle size is in the range from 1 to less than 50 nm.
Claim 6
Dependent Claim
20 words
Metal powders as claimed in claim 2, wherein the metal powders have an oxygen content of less than 5,000 ppm.
Claim 7
Dependent Claim
45 words
Metal powders as claimed in claim 1, wherein less than 1% of the individual particles deviate by more than 10% from the average particle size of said powders and no individual particles deviate by more than 40% from the average particle size of said powders.
Claim 8
Dependent Claim
28 words
Metal powders as claimed in claim 6, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 200 ppm.
Claim 9
Dependent Claim
23 words
Metal powders as claimed in claim 1, wherein the average particle size is in the range from 1 to less than 50 nm.
Claim 10
Dependent Claim
28 words
Metal powders as claimed in claim 8, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 5000 ppm.
Claim 11
Dependent Claim
23 words
Metal powders as claimed in claim 1, wherein the average particle size is in the range from 1 to less than 10 nm.
Claim 12
Dependent Claim
28 words
Metal powders as claimed in claim 10, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 200 ppm.
Claim 13
Dependent Claim
20 words
Metal powders as claimed in claim 1, wherein the metal powders have an oxygen content of less than 5,000 ppm.
Claim 14
Dependent Claim
20 words
Metal powders as claimed in claim 1, wherein the metal powders have an oxygen content of less than 1,000 ppm.
Claim 15
Dependent Claim
20 words
Metal powders as claimed in claim 1, wherein the metal powders have an oxygen content of less than 100 ppm.
Claim 16
Dependent Claim
28 words
Metal powders as claimed in claim 1, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 5000 ppm.
Claim 17
Dependent Claim
28 words
Metal powders as claimed in claim 1, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 1000 ppm.
Claim 18
Dependent Claim
28 words
Metal powders as claimed in claim 1, wherein the sum total of the impurities, except for the oxidic impurities, in the metal powders is less than 200 ppm.
Claim 19
Dependent Claim
14 words
Powders as claimed in claim 1, comprising a quantity of more than 1 kg.
Claim 20
Dependent Claim
20 words
Metal powders as claimed in claim 1, wherein the metal powders have an oxygen content of less than 50 ppm.
Claim 21
Dependent Claim
71 words
Fine-particle powders of at least one metal selected from the group consisting of Fe, Co, Ni, W and Mo which have an average particle size of from 1 to less than 5 nm, wherein less than 1% of the individual particles deviate by more than 40% from the average particle size of said powders and no individual particles deviate by more than 60% from the average particle size of said powders.
Claim 22
Dependent Claim
71 words
Fine-particle powders of at least one metal selected from the group consisting of Fe, Co, Ni, W and Mo which have an average particle size of from 1 to less than 5 nm, wherein less than 1% of the individual particles deviate by more than 40% from the average particle size of said powders and no individual particles deviate by more than 60% from the average particle size of said powders.
References Cited (Backward Citations)
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US4383852A
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| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
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