US3218156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for vacuum deoxidation of alloys
Assignee: Howmet Turbine Components Corp
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Filing: 1963-10-16
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Granted: 1965-11-16
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Expires: 1983-10-16
Abstract
No abstract record available.
Inventors
- 👤 Sluis Jay L Vander
- 👤 Frank G Vihtelic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; C22; C22C; C22C1/00; C22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOF FOR DE-OXIDIZING ANALLOY COMPRISING THE STEPS OF MELTING THE ALLOY WHILE MAINTAINED UNDER A VACUUM BELOW 100 MICRONS OF MERCURY TO THEREBY ROMOVE A SUBSTANTIAL AMOUNT OF THE IMPURITIES THEREIN, INCREASING THE PRESSURE OVE THE MELT ABOVE 100 MICRONS OF MERCURY, ADDING FROM ABOUT 0.01 TO ABOUT 0.5 PERCENT BY WEIGHT RARE EARTH METAL TO THE MELT WHEREBY THE RARE EARTH METAL WILL GO INTO SOLUTION AND COMBINE WITH THE OXYGEN THEREIN, AND REINSTITUTING A VACCUM BELOW 10 MICRONS OF MERCURY WHEREBY RARE EARTH METAL OXIDE AND EXCESS RARE EARTH METAL WILL VAPORIZE AND DISSOCIATE FROM THE MELT.
Claim 2
Dependent Claim
100 words
A METHOF FOR DE-OXIDIZING ANALLOY COMPRISING THE STEPS OF MELTING THE ALLOY WHILE MAINTAINED UNDER A VACUUM BELOW 100 MICRONS OF MERCURY TO THEREBY ROMOVE A SUBSTANTIAL AMOUNT OF THE IMPURITIES THEREIN, INCREASING THE PRESSURE OVE THE MELT ABOVE 100 MICRONS OF MERCURY, ADDING FROM ABOUT 0.01 TO ABOUT 0.5 PERCENT BY WEIGHT RARE EARTH METAL TO THE MELT WHEREBY THE RARE EARTH METAL WILL GO INTO SOLUTION AND COMBINE WITH THE OXYGEN THEREIN, AND REINSTITUTING A VACCUM BELOW 10 MICRONS OF MERCURY WHEREBY RARE EARTH METAL OXIDE AND EXCESS RARE EARTH METAL WILL VAPORIZE AND DISSOCIATE FROM THE MELT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |