US3009809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering of iron-aluminum base powders
Assignee: Individual
•
Filing: 1959-02-27
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Granted: 1961-11-21
•
Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph Neri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF SINTERING A SUPERFICIALLY OXIDIZED IRONALUMINUM BASE POWER MASS CONSISTING ESSENTIALLY BY WEIGHT OF BETWEEN ABOUT 4.0% TO 11.0% OF ALUMINUM, AND THE BALANCE IRON, SAID METHOD COMPRISING THE STEPS OF UNIFORMLY ADMIXING WITH SAID POWDER MASS SILICON IN AN AMOUNT SUCH THAT THE WEIGHT RATIO OF SILICON TO ALUMINUM IS AT LEAST 0.1, AND TIN IN AN AMOUNT EQUAL TO AT LEAST 0.5% BY WEIGHT OF THE TOTAL MIXTURE, AND PROGRESSIVELY HEATING THE RESULTING POWDER MIXTURE IN A NON-OXIDIZING ENVIRONMENT FROM A TEMPERATURE BETWEEN ABOUT 500*C. AND 600*C. MAINTAINED FOR NOT LESS THAN ABOUT 1 HOUR, TO A TERMINAL TEMPERATURE BETWEEN ABOUT 1300*C. AND 1375*C. MAINTAINED FOR NOT LESS THAN ABOUT ONE HOUR.
Claim 2
Independent Claim
116 words
A METHOD OF SINTERING A SUPERFICIALLY OXIDIZED IRONALUMINUM BASE POWER MASS CONSISTING ESSENTIALLY BY WEIGHT OF BETWEEN ABOUT 4.0% TO 11.0% OF ALUMINUM, AND THE BALANCE IRON, SAID METHOD COMPRISING THE STEPS OF UNIFORMLY ADMIXING WITH SAID POWDER MASS SILICON IN AN AMOUNT SUCH THAT THE WEIGHT RATIO OF SILICON TO ALUMINUM IS AT LEAST 0.1, AND TIN IN AN AMOUNT EQUAL TO AT LEAST 0.5% BY WEIGHT OF THE TOTAL MIXTURE, AND PROGRESSIVELY HEATING THE RESULTING POWDER MIXTURE IN A NON-OXIDIZING ENVIRONMENT FROM A TEMPERATURE BETWEEN ABOUT 500*C. AND 600*C. MAINTAINED FOR NOT LESS THAN ABOUT 1 HOUR, TO A TERMINAL TEMPERATURE BETWEEN ABOUT 1300*C. AND 1375*C. MAINTAINED FOR NOT LESS THAN ABOUT ONE HOUR.
References Cited (Backward Citations)
US2192742A
Cited
US2407234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |