US2805148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of melting refractory metals
Assignee: EIDP Inc
•
Filing: 1952-10-21
•
Granted: 1957-09-03
•
Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 Long William B De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
C; C22; C22B; C22B34/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A PROCESS FOR REMOVING A MOLTEN METAL PRODUCT SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, COLUMBIUM, TANTALUM, CHROMIUM, MOLYBDENUM AND TUNGSTEN, FROM A HEATING AND MELTING ZONE WHEREIN SAID PRODUCT IS RETAINED ON A PROTECTIVE BODY OF THE SAME METAL IN SOLID STATE, COMPRISING MELTING AND PERFORATING A PROTION OF SAID SOLID PROTECTIVE BODY WHILE AT ITS REACTION TEMPERATURE WITH CHLORINE BY DIRECTLY APPLYING A STREAM OF CHLORINE THEREAGAINST, AND WITH DRAWING THE MOLTEN METAL PRODUCT FROM SAID ZONE THROUGH THE RESULTING PERFORATION IN SAID PROTECTIVE BODY.
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |