US3120436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered metal article and method of making
Assignee: Presmet Corp
•
Filing: 1961-03-23
•
Granted: 1964-02-04
•
Expires: 1981-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harold T Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:30
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF FORMING A POWDERED METAL ARTICLE, COMPRISING THE STEPS, OF MIXING WHITE CAST IRON POWDER WITH PURE IRON POWDER, PRESSING THE RESULTING POWDER MIXTURE TO OBTAIN A FORMED ARTICLE, PLACING THE FORMED ARTICLE IN CONTACT WITH A QUANTITY OF COPPER IN THE SOLID STATE, AND PASSING THE ARTICLE AND COPPER THROUGH A FURNACE HAVING A FIRST ZONE AT A TEMPERATURE BELOW THE MELTING POINT OF THE COPPER AND AT A SECOND ZONE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE COPPER.
Claim 2
Independent Claim
84 words
A METHOD OF FORMING A POWDERED METAL ARTICLE, COMPRISING THE STEPS, OF MIXING WHITE CAST IRON POWDER WITH PURE IRON POWDER, PRESSING THE RESULTING POWDER MIXTURE TO OBTAIN A FORMED ARTICLE, PLACING THE FORMED ARTICLE IN CONTACT WITH A QUANTITY OF COPPER IN THE SOLID STATE, AND PASSING THE ARTICLE AND COPPER THROUGH A FURNACE HAVING A FIRST ZONE AT A TEMPERATURE BELOW THE MELTING POINT OF THE COPPER AND AT A SECOND ZONE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE COPPER.
References Cited (Backward Citations)
GB308819A
Cited
US2198254A
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US2422439A
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GB720050A
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US2706694A
Cited
US2759846A
Cited
US2778742A
Cited
US2851354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |