US4676831A
Expired / Lapsed
US
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Powder mixture containing talloil free of segregation
Assignee: Hoganas AB
•
Filing: 1984-09-05
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Granted: 1987-06-30
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Expires: 2004-09-05
Abstract
Abstract PCT No. PCT/SE84/00290 Sec. 371 Date Apr. 26, 1985 Sec. 102(e) Date Apr. 26, 1985 PCT Filed Sep. 5, 1984 PCT Pub. No. WO85/01230 PCT Pub. Date Mar. 28, 1985.The present invention refers to iron based powder mixtures, which except iron or steel powder and one or more alloying elements in powder form also contain an addition of up to 0.5% of talloil to prevent segregation/dusting.
Inventors
- 👤 Ulf F. Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:26
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264; C22C33/0271; B; B22; B22F; B22F1/00; B22F1/10; B22F1/14; B22F1/148; C22C33/0207; C22C33/0214
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
Iron based powder mixture comprising iron or steel powder, one or more alloying elements in powder form, and an amount up to 0.5% of tall oil to prevent segregation and/or dusting.
Claim 2
Dependent Claim
31 words
Iron based powder mixture comprising iron or steel powder, one or more alloying elements in powder form, and an amount up to 0.5% of tall oil to prevent segregation and/or dusting.
Claim 3
Dependent Claim
19 words
Iron based powder mixture according to claim 1 wherein the powder mixture contains up to 2.0% of graphite powder.
Claim 4
Dependent Claim
39 words
Iron based powder mixture according to claim 1 wherein the mixture contains up to 1.5% of phosphorus added in the form of a ferrophosphorus powder with a particle size of maximum 44 μm and a phosphorus content of 14-18%.
Claim 5
Dependent Claim
18 words
Iron based powder mixture according to claim 3 wherein the mixture contains up to 2.0% of graphite powder.
Claim 6
Dependent Claim
17 words
Iron based powder mixture according to claim 1 wherein said powder mixture contains 0.10-0.30% of tall oil.
Claim 7
Dependent Claim
19 words
Iron based powder mixture according to claim 5 wherein the powder mixture contains up to 20% of graphite powder.
Claim 8
Dependent Claim
39 words
Iron based powder mixture according to claim 5 wherein the mixture contains up to 1.5% of phosphorus added in the form of a ferrophosphorus powder with a particle size of maximum 44 μm and a phosphorus content of 14-18%.
Claim 9
Dependent Claim
18 words
Iron based powder mixture according to claim 7 wherein the mixture contains up to 2.0% of graphite powder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |