Patent USRE30855E successfully refreshed from Google Patents.
USRE30855E
Expired / Lapsed
US
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Powder metal composition
Assignee: Pitney Bowes Inc
•
Filing: 1981-02-20
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Granted: 1982-01-26
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Expires: 2001-02-20
Abstract
Abstract A powder metal composition containing 1.0-2.5% Ni, 0.3-0.7% Mo, 0.15-0.30% Mn, 0.5-1.5% Cu, 0.3-0.7% C, 0.50-1.0% zinc stearate, the balance being Fe.
Inventors
- 👤 Yew-Tsung Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A powder metal composition comprising: 1.0-2.5% Ni, 0.3-0.7 Mo, 0.15-0.30 Mn, 0.5-1.5% Cu, 0.3-0.7 C, 0.50-1.0% zinc stearate, the balance being Fe.
Claim 2
Dependent Claim
22 words
A powder metal composition comprising: 1.0-2.5% Ni, 0.3-0.7 Mo, 0.15-0.30 Mn, 0.5-1.5% Cu, 0.3-0.7 C, 0.50-1.0% zinc stearate, the balance being Fe.
Claim 3
Dependent Claim
37 words
The composition of claim 1 wherein said amount of Ni is 1.8%, said amount of Mo 0.6%, said amount of Mn is 0.25%, said amount of C is 0.6%, and said amount of zinc stearate is 0.75%.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein said amount of Cu is 0.82%. .Iadd.
Claim 5
Dependent Claim
87 words
A sintered powder metal composition comprising 1.0-2.5% Ni, 0.3-0.7% Mo, 0.15-0.30% Mn, 0.5-1.5% Cu, 0.3-0.7% C, the balance being Fe. .Iaddend. .Iadd.5. A method for improving the tensile strength, fractured toughness, machineability and dimension stability of a sintered powder metal composition, said composition including 1.0-2.5% Ni, 0.3-0.7% Mo, 0.15-0.30% Mn, 0.3-0.7% C, the balance being Fe, comprising adding to said powder metal composition copper in an amount from 0.5-1.5%. .Iaddend. .Iadd.6. A method according to claim 5 further comprising adding 0.50-1.0% zinc stearate to said composition. .Iaddend.
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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) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |