US2548897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for melting hafnium, zirconium, and titanium metals
Assignee: Individual
•
Filing: 1947-04-07
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Granted: 1951-04-17
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Expires: 1967-04-07
Abstract
No abstract record available.
Inventors
- 👤 William J Kroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0291; C22B34/00; C22B34/10; C22B34/12; C22B34/1295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A METHOD FOR THE PRODUCTION OF MALLEABLE DINGOTS OF THE GROUP IVB METALS AND THEIR ALLOYS INVOLVING MELTING SAID METAL IN A DEGASSED GRAPHITE CRUCIBLE AND TRANSFERRING THE MOLTEN METAL TO A COLD MOLD.
Claim 2
Independent Claim
34 words
A METHOD FOR THE PRODUCTION OF MALLEABLE DINGOTS OF THE GROUP IVB METALS AND THEIR ALLOYS INVOLVING MELTING SAID METAL IN A DEGASSED GRAPHITE CRUCIBLE AND TRANSFERRING THE MOLTEN METAL TO A COLD MOLD.
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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |