Patent US5777988A successfully refreshed from Google Patents.
Patent US3099554A successfully refreshed from Google Patents.
US3099554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing metals
Assignee: Union Carbide Corp
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Filing: 1961-02-21
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Granted: 1963-07-30
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Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 James H Downing
- 👤 Benjamin J Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:22
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/32; C22B5/00; C22B5/02; C22B5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A PROCESS FOR PRODUCING AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND CHROMIUM FROM SOLID STATE BORIDES OF SAID METALS COMPRISING CHARGING AT LEAST ONE OF SAID BORIDES OF SAID SELECTED METALS IN PARTICULATE FROM RANGING FROM ABOUT 0.125 TO ABOUT 0.5 INCH IN DIAMETER INTO A VACUUM FURNACE; EVACUATING SUBSTANTIALLY ALL THE GAS REACTIVE WITH SAID BORIDE AND SAID SELECTED METAL FROM SAID VACUUM FURNACE; HEATING SAID BORIDE OF SAID SELECTED METAL IN VACUO TO A TEMPRATURE SUFFICIENTLY HIGH TO PRODUCE METAL VAPOR OF SAID SELECTED METAL AT LEAST A VAPOR PRESSURE IN EXCESS OF THE AMBIENT PRESSURE WITHIN SAID VACUUM FURNACE; MAINTAINING A TEMPERATURE SUFFICIENTLY HIGH TO MAINTAIN A METAL VAPOR OF SAID SELECTED METAL AT LEAST AT A VAPOR PRESSURE IN EXCESS OF THE AMBIENT PRESSURE WITHIN SAID VACUUM FURNACE WHILE ESSENTIALLY MAINTAINING SAID BORIDE IN SAID SOLID STATE; CONDUCTING AT LEAST A PORTION OF SAID METAL VAPOR TO A CONDENSING ZONE AND CONDENSING SAID METAL VAPOR TO FORM AT LEAST ONE OF SAID SELECTED METALS IN SUBSTANTIALLY PURE METALLIC FORM.
Claim 2
Dependent Claim
180 words
A PROCESS FOR PRODUCING AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND CHROMIUM FROM SOLID STATE BORIDES OF SAID METALS COMPRISING CHARGING AT LEAST ONE OF SAID BORIDES OF SAID SELECTED METALS IN PARTICULATE FROM RANGING FROM ABOUT 0.125 TO ABOUT 0.5 INCH IN DIAMETER INTO A VACUUM FURNACE; EVACUATING SUBSTANTIALLY ALL THE GAS REACTIVE WITH SAID BORIDE AND SAID SELECTED METAL FROM SAID VACUUM FURNACE; HEATING SAID BORIDE OF SAID SELECTED METAL IN VACUO TO A TEMPRATURE SUFFICIENTLY HIGH TO PRODUCE METAL VAPOR OF SAID SELECTED METAL AT LEAST A VAPOR PRESSURE IN EXCESS OF THE AMBIENT PRESSURE WITHIN SAID VACUUM FURNACE; MAINTAINING A TEMPERATURE SUFFICIENTLY HIGH TO MAINTAIN A METAL VAPOR OF SAID SELECTED METAL AT LEAST AT A VAPOR PRESSURE IN EXCESS OF THE AMBIENT PRESSURE WITHIN SAID VACUUM FURNACE WHILE ESSENTIALLY MAINTAINING SAID BORIDE IN SAID SOLID STATE; CONDUCTING AT LEAST A PORTION OF SAID METAL VAPOR TO A CONDENSING ZONE AND CONDENSING SAID METAL VAPOR TO FORM AT LEAST ONE OF SAID SELECTED METALS IN SUBSTANTIALLY PURE METALLIC FORM.
References Cited (Backward Citations)
US2931719A
Cited
US2987383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |