US3116998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous vacuum and inert gas process for treating titanium and other metals
Assignee: LIGHT METALS RES LAB Inc
•
Filing: 1959-12-31
•
Granted: 1964-01-07
•
Expires: 1979-12-31
Abstract
No abstract record available.
Inventors
- 👤 George A Pagonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:54
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/04; C22B9/05; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR PURIFYING A METAL COMPRISING MAINTAINING SAID METAL IN CONTINUOUS CONTACT WITH INERT GAS ABOVE ATMOSPHERIC PRESSURE WHILE PASSING SAID METAL THROUGH A PLURALITY OF ZONES IN A CLOSED SYSTEM, SAID ZONES BEING CAPABLE OF ISOLATION FROM EACH OTHER; MAINTAINING A RELATIVELY DEEP BODY OF MOLTEN METAL IN EACH OF SAID ZONES DURING THE TREATMENT OF SAID METAL THEREIN; INTERMITTENTLY FEEDING CHARGES OF VACUUM-SURFACE-DEGASIFIED, PREHEATED SOLID METAL TO THE FIRST OF SAID ZONES INTO THE BODY OF MELT MAINTAINED THEREIN; TRANSFERRING PORTIONS OF MOLTEN METAL UNDER INERT GAS PRESSURE FROM ZONE TO ZONE, SAID ZONES BEING ISOLATED FROM ONE ANOTHER DURING TREATMENT OF THE METAL THEREIN, WITHDRAWING PORTIONS OF THE TREATED METAL FROM THE LAST OF SAID ZONES; AND TREATING SAID MOLTEN
Claim 2
Dependent Claim
124 words
A PROCESS FOR PURIFYING A METAL COMPRISING MAINTAINING SAID METAL IN CONTINUOUS CONTACT WITH INERT GAS ABOVE ATMOSPHERIC PRESSURE WHILE PASSING SAID METAL THROUGH A PLURALITY OF ZONES IN A CLOSED SYSTEM, SAID ZONES BEING CAPABLE OF ISOLATION FROM EACH OTHER; MAINTAINING A RELATIVELY DEEP BODY OF MOLTEN METAL IN EACH OF SAID ZONES DURING THE TREATMENT OF SAID METAL THEREIN; INTERMITTENTLY FEEDING CHARGES OF VACUUM-SURFACE-DEGASIFIED, PREHEATED SOLID METAL TO THE FIRST OF SAID ZONES INTO THE BODY OF MELT MAINTAINED THEREIN; TRANSFERRING PORTIONS OF MOLTEN METAL UNDER INERT GAS PRESSURE FROM ZONE TO ZONE, SAID ZONES BEING ISOLATED FROM ONE ANOTHER DURING TREATMENT OF THE METAL THEREIN, WITHDRAWING PORTIONS OF THE TREATED METAL FROM THE LAST OF SAID ZONES; AND TREATING SAID MOLTEN
References Cited (Backward Citations)
US2734244A
Cited
US465672A
Cited
BE505801A
Cited
US2060133A
Cited
US2426814A
Cited
US2756138A
Cited
US2548897A
Cited
US2550735A
Cited
GB671678A
Cited
US2564337A
Cited
US2564498A
Cited
GB736852A
Cited
US2684297A
Cited
US2824794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |