US4946499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing iron base powder mixture for pm
Assignee: JFE Steel Corp
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Filing: 1988-09-29
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Granted: 1990-08-07
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Expires: 2008-09-29
Abstract
Abstract An iron base powder mixture for powder metallurgy, comprising an iron based powder and an alloying powder and/or a powder for improving machinability, wherein the alloying powder and/or the powder for improving machinability are adhered to the surface of the ferrous powder by means of a melted-together binder composed of an oil and a metal soap or wax.
Inventors
- 👤 Ichio Sakuranda
- 👤 Ritsuo Okabe
- 👤 Takao Omura
- 👤 Yoshisato Kiyota
- 👤 Shigeaki Takajo
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; C22C33/0207; B; B22; B22F; B22F1/00; B22F1/10; B22F1/103; B22F1/108; B22F2998/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A method for producing an iron base powder mixture for powder metallurgy, comprising the steps of mixing a ferrous powder and an alloying powder with a powdered metal soap or wax, and with an oil, heating the mixture either while mixing or thereafter to 90°-150° C. to produce a melted-together binder of the oil and the metal soap or wax powder; and subsequently stirring and cooling to 85° C. or lower, thereby causing the alloying powder to adhere to the surface of the ferrous powder by the said melted-together binder.
Claim 2
Independent Claim
90 words
A method for producing an iron base powder mixture for powder metallurgy, comprising the steps of mixing a ferrous powder and an alloying powder with a powdered metal soap or wax, and with an oil, heating the mixture either while mixing or thereafter to 90°-150° C. to produce a melted-together binder of the oil and the metal soap or wax powder; and subsequently stirring and cooling to 85° C. or lower, thereby causing the alloying powder to adhere to the surface of the ferrous powder by the said melted-together binder.
References Cited (Backward Citations)
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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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |