US4030913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing pyrophorous iron powder
Assignee: US Philips Corp
•
Filing: 1976-05-26
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Granted: 1977-06-21
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Expires: 1996-05-26
Abstract
Abstract The stabilization of pyrophorous iron powder in a liquid medium can be carried out in a very short time and particularly carefully when the powders are contacted with organic compounds which contain nitrogen bound to oxygen, for example, nitromethane, nitrobenzene or nitrosobenzene.
Inventors
- 👤 Joachim Wegener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/061; B; B22; B22F; B22F1/00; B22F1/10; B22F1/102; C; C21; C21B; C21B13/00; C21B13/0086; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/147
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
A method of stabilizing pyrophorous iron powder in a liquid medium, characterized in that the powders are contacted with organic compounds which contain oxygen bound to nitrogen.
Claim 2
Independent Claim
27 words
A method of stabilizing pyrophorous iron powder in a liquid medium, characterized in that the powders are contacted with organic compounds which contain oxygen bound to nitrogen.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1, characterized by the use of nitroaliphates with 1 to 10 carbon atoms in the molecule.
Claim 4
Dependent Claim
16 words
A method as claimed in claim 2, characterized by the use of nitromethane, nitroethane and/or nitropropane,
Claim 5
Dependent Claim
15 words
A method as claimed in claim 1, characterized by the use of N--O containing aromates.
Claim 6
Dependent Claim
17 words
A method as claimed in claim 4, characterized by the use of nitrobenzene, its homologues and derivitives.
Claim 7
Dependent Claim
13 words
A method as claimed in claim 4, characterized by the use of nitrosobenzene.
Claim 8
Dependent Claim
38 words
A method as claimed in claim 1, characterized in that NO 2 -containing organic compounds are used in a ratio of molar concentration of iron to NO 2 -containing compound smaller than 20 calculated on a nitro group.
Claim 9
Dependent Claim
34 words
A method as claimed in claim 1, characterized in that NO-containing organic compounds are used in a ratio of molar concentration of iron to NO-containing compound smaller than 10 calculated on a nitroso group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |