US4609527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder consolidation and machining
Assignee: Individual
•
Filing: 1985-05-24
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Granted: 1986-09-02
•
Expires: 2005-05-24
Abstract
Abstract The specification discloses a powder process in which metal or ceramic particles are mixed with a binder such as ultra high molecular weight polyethylene powder and are compacted. The compacted shape is heated to a temperature near the melting point of the binder to consolidate the binder and produce a green shape. The green shape is formed and the binder is removed. Thereafter, the shape is sintered to form a final part.
Inventors
- 👤 James R. Rinderle
- 👤 Michael K. Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63408; B; B22; B22F; B22F1/00; B22F1/10; B22F3/00; B22F3/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
48 words
The process of forming machined metal parts from powder which comprises the steps of blending powder and a binder to form a mixture, shaping the mixture, heating the shape to an amount sufficient to consolidate the binder, forming the shape, extracting the binder, and then sintering the shape.
Claim 2
Dependent Claim
48 words
The process of forming machined metal parts from powder which comprises the steps of blending powder and a binder to form a mixture, shaping the mixture, heating the shape to an amount sufficient to consolidate the binder, forming the shape, extracting the binder, and then sintering the shape.
Claim 3
Dependent Claim
13 words
The process of claim 1 in which the forming is done by machining.
Claim 4
Dependent Claim
17 words
The process of claim 1 in which the binder comprises an ultra high molecular weight polyethylene material.
Claim 5
Dependent Claim
13 words
The process of claim 3 in which the forming is done by machining.
Claim 6
Dependent Claim
20 words
The process of claim 3 in which the heating step is carried out at a temperature of about 300° F.
Claim 7
Dependent Claim
35 words
The process of claim 5 in which the binder is extracted by a further heating step in which the shape is heated to a temperature in the range of about 330° C. to 400° C.
Claim 8
Dependent Claim
79 words
The process of forming machined parts from powder which comprises blending a powder selected from the group consisting of metal powder and ceramic powder with an organic binder, compacting the mixture of powder and binder to a shape by pressing the mixture in a mold, consolidating the compacted mixture by heating to a temperature sufficient to cause the binder to flow and to hold the particles together, machining the consolidated shape, extracting the binder, and sintering the machined shape.
Claim 9
Dependent Claim
79 words
The process of forming machined parts from powder which comprises blending a powder selected from the group consisting of metal powder and ceramic powder with an organic binder, compacting the mixture of powder and binder to a shape by pressing the mixture in a mold, consolidating the compacted mixture by heating to a temperature sufficient to cause the binder to flow and to hold the particles together, machining the consolidated shape, extracting the binder, and sintering the machined shape.
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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |