Patent US2773787A successfully refreshed from Google Patents.
US2773787A
Expired / Lapsed
US
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Production of group iv-a metals
Assignee: EIDP Inc
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Filing: 1952-12-20
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Granted: 1956-12-11
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Expires: 1972-12-20
Abstract
No abstract record available.
Inventors
- 👤 Christian E Rick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
A METHOD FOR REMOVING COMBINED OXYGEN AND NITROGEN IMPURITY CONTAMINANTS FROM A METAL PRODUCT SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND HAFNIUM WHICH COMPRISES HEATING SAID PRODUCT TO A TEMPERATURES RANGING FROM ABOUT 500-1800* C. UNDER AN INERT ATMOSPHERE WITH AN AMOUNT OF A SOLID ELEMENTAL METALTREATING AGENT SELECTED FROM THE GROUP CONSISTING OF GERMANIUM, GALLIUM AND INDIUM SUBSTANTIALLY THE CHEMICAL EQUIVALENT OF SAID CONTAMINANTS AND UNTIL THE LATTER VOLATILIZES AS COMPOUNDS OF SAID TREATING AGENT, EFFECTING SAID HEATING IN A CLOSED REACTION ZONE AND AT A TEMPERATURE AT LEAST EQUAL TO THE VOLATILIZATION TEMPERATURE OF SAID COMPOUND BUT BELOW THE BOILING POINT OF SAID TREATING AGENT, AND SEPARATING AND RECOVERING THE RESULTING PURIFIED, TREATED METAL PRODUCT FROM SAID VOLATILIZED CONTAMINANT COMPOUNDS.
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |