Patent US3000071A successfully refreshed from Google Patents.
US3000071A
Expired / Lapsed
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Method of sintering intermetallic materials
Assignee: Fansteel Inc
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Filing: 1953-04-23
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Granted: 1961-09-19
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Expires: 1973-04-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Wehrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C01; C01B; C01B33/00; C01B33/06; C04B35/515; C04B35/58; C04B35/58085; C04B35/58092; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/6346; C04B35/65; H; H01; H01B; H01B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF FORMING AN ARTICLE OF MANUFACTURE OF DENSE, NONPOROUS, REFRACTORY CHARACTER RESISTANT TO OXIDATION IN AIR AT HIGH TEMPERATURES IN THE RANGE OF FROM ABOUT 1600*C. TO ABOUT 2000*C., COMPRISING MILLING TO A PARTICLE SIZE RANGE OF 0.5 TO 5 MICRONS AN ALLOY OR INTERMETALLIC COMPOSITION OF SILICON WITH ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF TANTALUM AND COLUMBIUM, SAID SILICON BEING IN PROPORTION OF 1 TO 3 ATOMS OF SILICON PER ATOM OF METAL, PRESSING SAID FINELY MILLED PRODUCT UNDER A FORMING PRESSURE EXCEEDING 5 TONS PER SQUARE INCH, TO REGULAR FORMS OF RODS, BARS, TUBES, DISCS, PLATES, PELLETS AND THE LIKE, AND IRREGULAR FORMS, AND HEATING SAID SHAPED PRODUCT IN AN OXIDIZING FREE ATMOSPHERE TO SINTER THE SAME IN A TEMPERATURE RANGE OF ABOUT 1300* TO 1800*C.
Claim 2
Independent Claim
134 words
THE METHOD OF FORMING AN ARTICLE OF MANUFACTURE OF DENSE, NONPOROUS, REFRACTORY CHARACTER RESISTANT TO OXIDATION IN AIR AT HIGH TEMPERATURES IN THE RANGE OF FROM ABOUT 1600*C. TO ABOUT 2000*C., COMPRISING MILLING TO A PARTICLE SIZE RANGE OF 0.5 TO 5 MICRONS AN ALLOY OR INTERMETALLIC COMPOSITION OF SILICON WITH ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF TANTALUM AND COLUMBIUM, SAID SILICON BEING IN PROPORTION OF 1 TO 3 ATOMS OF SILICON PER ATOM OF METAL, PRESSING SAID FINELY MILLED PRODUCT UNDER A FORMING PRESSURE EXCEEDING 5 TONS PER SQUARE INCH, TO REGULAR FORMS OF RODS, BARS, TUBES, DISCS, PLATES, PELLETS AND THE LIKE, AND IRREGULAR FORMS, AND HEATING SAID SHAPED PRODUCT IN AN OXIDIZING FREE ATMOSPHERE TO SINTER THE SAME IN A TEMPERATURE RANGE OF ABOUT 1300* TO 1800*C.
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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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |