US2847205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metals
Assignee: National Research Corp
•
Filing: 1954-10-13
•
Granted: 1958-08-12
•
Expires: 1974-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Milo P Hnilicka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1263; C22B34/1268; C22B34/1272; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
APPARATUS FOR PRODUCING A REFRACTORY METAL BY THE REDUCTION OF A COMPOUND THEREOF CARRIED IN A MOLTEN SALT, SAID SYSTEM COMPRISING A FIRST CHAMBER, A SECOND CHAMBER, MEANS DEFINING A PASSAGE FOR MOLTEN SALT CONNECTING SAID TWO CHAMBERS, MEANS FOR PARTIALLY PLUGGING THE PASSAGE, AND MEANS FOR FEEDING A REFRIGERANT TO THE INTERIOR OF THE PLUGGING MEANS.
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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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |