Patent US2838392A successfully refreshed from Google Patents.
US2838392A
Expired / Lapsed
US
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Methods and apparatus for treating metallic and non-metallic powders
Assignee: SK Wellman Corp
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Filing: 1953-07-30
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Granted: 1958-06-10
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Expires: 1973-07-30
Abstract
No abstract record available.
Inventors
- 👤 Bielawski Chester Aloysius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF PREPARING POWDERS FOR MAKING FRICTION BODIES OF SINTERED POWDERED METALLIC AND NONMETALLIC MATERIALS COMPRISING A PREDOMINANT COMPONENT AND AN AGGLOMERATE IN MINOR QUANTITY, THE SAID METHOD COMPRISING THE STEPS OF SCREENING AND PRE-MIXING A FRACTION OF THE PREDOMINANT COMPONENT WITH ALL OF THE AGGLOMERATE, ADDING THE REMAINDER OF THE MATERIALS, SUBJECTING ALL OF THE MATERIALS TO A VACUUM AND TO HEAT, BLENDING THE MATERIALS TOGETHER WHILE MAINTAINING SAID VACUUM, AND REPLACING SAID VACUUM WITH A NON-OXIDIZING ATMOSPHERE WHILE ALLOWING SAID MATERIALS TO COOL.
Claim 2
Independent Claim
86 words
THE METHOD OF PREPARING POWDERS FOR MAKING FRICTION BODIES OF SINTERED POWDERED METALLIC AND NONMETALLIC MATERIALS COMPRISING A PREDOMINANT COMPONENT AND AN AGGLOMERATE IN MINOR QUANTITY, THE SAID METHOD COMPRISING THE STEPS OF SCREENING AND PRE-MIXING A FRACTION OF THE PREDOMINANT COMPONENT WITH ALL OF THE AGGLOMERATE, ADDING THE REMAINDER OF THE MATERIALS, SUBJECTING ALL OF THE MATERIALS TO A VACUUM AND TO HEAT, BLENDING THE MATERIALS TOGETHER WHILE MAINTAINING SAID VACUUM, AND REPLACING SAID VACUUM WITH A NON-OXIDIZING ATMOSPHERE WHILE ALLOWING SAID MATERIALS TO COOL.
References Cited (Backward Citations)
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US1938306A
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US1867541A
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US2018082A
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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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |