US4499049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of consolidating a metallic or ceramic body
Assignee: POWMET FORGINGS LLC
•
Filing: 1983-02-23
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Granted: 1985-02-12
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Expires: 2003-02-23
Abstract
Abstract A method of consolidating a metallic or ceramic body is disclosed. The method comprises the steps of forming an article of manufacture from powdered metal; sintering the article of manufacture so as to increase the strength thereof; providing a bed of heated, generally spheroidal ceramic particles which have been coated with a thermally stable lubricant; and compacting the article of manufacture embedded in the heated bed under pressure to thereby consolidate the article into a dense, desired shape.
Inventors
- 👤 Francis G. Hanejko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
A method of consolidating a metallic or ceramic body comprising the steps of: (a) forming an article of manufacture from powdered metal or ceramic materials; (b) sintering said article of manufacture so as to increase the strength thereof; (c) providing a bed of heated, generally spheroidal ceramic particles which have been coated with a thermally stable, generally non-reactive lubricant; and (d) compacting said article of manufacture in said heated bed of generally spheroidal coated ceramic particles under high pressure to thereby consolidate said article of manufacture into a dense, desired shape.
Claim 2
Independent Claim
91 words
A method of consolidating a metallic or ceramic body comprising the steps of: (a) forming an article of manufacture from powdered metal or ceramic materials; (b) sintering said article of manufacture so as to increase the strength thereof; (c) providing a bed of heated, generally spheroidal ceramic particles which have been coated with a thermally stable, generally non-reactive lubricant; and (d) compacting said article of manufacture in said heated bed of generally spheroidal coated ceramic particles under high pressure to thereby consolidate said article of manufacture into a dense, desired shape.
Claim 3
Dependent Claim
24 words
A method of consolidating a metallic or ceramic body according to claim 1 wherein said article of manufacture is formed by compacting powdered metal.
Claim 4
Dependent Claim
21 words
A method of consolidating a metallic or ceramic body according to claim 1 wherein said generally spheroidal ceramic particles are alumina.
Claim 5
Independent Claim
29 words
A method of consolidating a metallic or ceramic body according to claims 1 or 2 where said generally spheroidal ceramic particles have a size of less than 140 mesh.
Claim 6
Independent Claim
20 words
A method of consolidating a metallic or ceramic body according to claims 1 or 3 wherein said lubricant is graphite.
Claim 7
Independent Claim
97 words
A method of consolidating a metallic body comprising the steps of: (a) forming an article of manufacture from powdered metal; (b) sintering said article of manufacture so as to increase the strength thereof; (c) providing a bed of heated, generally spheroidal ceramic particles which have been coated with a thermally stable, generally non-reactive lubricant; (d) heating said coated article of manufacture to a predetermined temperature; and (e) compacting said object of manufacture in said heated bed of generally spheroidal coated ceramic particles under high pressure to thereby consolidate said article of manufacture into a dense, desired shape.
Claim 8
Independent Claim
97 words
A method of consolidating a metallic body comprising the steps of: (a) forming an article of manufacture from powdered metal; (b) sintering said article of manufacture so as to increase the strength thereof; (c) providing a bed of heated, generally spheroidal ceramic particles which have been coated with a thermally stable, generally non-reactive lubricant; (d) heating said coated article of manufacture to a predetermined temperature; and (e) compacting said object of manufacture in said heated bed of generally spheroidal coated ceramic particles under high pressure to thereby consolidate said article of manufacture into a dense, desired shape.
Claim 9
Dependent Claim
19 words
A method of consolidating a metallic body according to claim 6 where said generally spheroidal ceramic particles are alumina.
Claim 10
Dependent Claim
22 words
A method of consolidating a metallic body according to claim 6 where steps (b) and (d) are preformed in a protective atmosphere.
Claim 11
Dependent Claim
29 words
A method of consolidating a metallic body according to claim 7 where said generally spheroidal alumina particles have a size in the range of about 100 to 140 mesh.
Claim 12
Independent Claim
18 words
A method of consolidating a metallic body according to claims 6 or 7 wherein said lubricant is graphite.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |