Patent US1890668A successfully refreshed from Google Patents.
Patent US2767052A successfully refreshed from Google Patents.
US2767052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of germanium from scrap materials
Assignee: Eagle Picher Co
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Filing: 1952-06-26
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Granted: 1956-10-16
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Harold R Harner
- 👤 Dwight S Trahin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
C; C01; C01G; C01G17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF PRODUCING GERMANIUM TETRACHLORIDE FROM GERMANIFEROUS SCRAP, WHICH METHOD COMPRISES, SUBJECTING THE SCRAP, AT ELEVATED TEMPERTURE, TO REDUCTION BY CONTACTING IT WITH HYDROGEN GAS, SUBSEQUENTLY EXPOSING THE REDUCED SCRAP TO CHLORINE GAS AT ELEVATED TEMPERATRE WHILE LIMITING THE AMOUNT OF CHLORINE GAS, TO FORM, COINCIDENTALLY, A REACTION PRODUCT CONSISTING OF PART GERMANIUM TETRACHLORIDE AND PART GERMANIUM DICHLORIDE, CONDUCTING THE REACTION PRODUCT FROM THE SITE OF THE REACTION, CONDENSING THE GERMANIUM DICHLORIDE COMPONENT THEREOF, AND SEPARATELY CONTACTING THE CONDENSED GERMANIUM DICHLORIDE WITH CHLORINE GAS TO CONVERT THE SAME TO GERMANIUM TETRACHLORIDE.
Claim 2
Independent Claim
92 words
THE METHOD OF PRODUCING GERMANIUM TETRACHLORIDE FROM GERMANIFEROUS SCRAP, WHICH METHOD COMPRISES, SUBJECTING THE SCRAP, AT ELEVATED TEMPERTURE, TO REDUCTION BY CONTACTING IT WITH HYDROGEN GAS, SUBSEQUENTLY EXPOSING THE REDUCED SCRAP TO CHLORINE GAS AT ELEVATED TEMPERATRE WHILE LIMITING THE AMOUNT OF CHLORINE GAS, TO FORM, COINCIDENTALLY, A REACTION PRODUCT CONSISTING OF PART GERMANIUM TETRACHLORIDE AND PART GERMANIUM DICHLORIDE, CONDUCTING THE REACTION PRODUCT FROM THE SITE OF THE REACTION, CONDENSING THE GERMANIUM DICHLORIDE COMPONENT THEREOF, AND SEPARATELY CONTACTING THE CONDENSED GERMANIUM DICHLORIDE WITH CHLORINE GAS TO CONVERT THE SAME TO GERMANIUM TETRACHLORIDE.
References Cited (Backward Citations)
US920391A
Cited
US1352912A
Cited
US1482306A
Cited
US1814392A
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US2020431A
Cited
US2378675A
Cited
US2510932A
Cited
US2594370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |