US2843613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating molybdenum from tungsten
Assignee: General Electric Co
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Filing: 1956-05-22
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Granted: 1958-07-15
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Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Robert C Osthoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
C; C01; C01G; C01G39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS OF SEPARATING TUNGSTEN FROM MOLYBDENUM WHICH PROCESS COMPRISES (1) TREATING A SOLUTION OF SALTS OF TUNGSTIC AND MOLYBDIC ACIDS WITH A LOWER DIALKYLTIN DIHALIDE TO PRECIPITATE A MIXTURE OF THE LOWER DIALKYLTIN SALTS OF SAID ACIDS, (2) DIGESTING THIS PRECIPITATE IN CONCENTRATED HYDROCHLORIDE ACID TO DISSOLVE THE LOWER DIALKYLTIN MOLYBDATE AND TO LEAVE BEHIND A PRECIPITATE OF THE TUNGSTEN COMPOUND.
Claim 2
Dependent Claim
62 words
A PROCESS OF SEPARATING TUNGSTEN FROM MOLYBDENUM WHICH PROCESS COMPRISES (1) TREATING A SOLUTION OF SALTS OF TUNGSTIC AND MOLYBDIC ACIDS WITH A LOWER DIALKYLTIN DIHALIDE TO PRECIPITATE A MIXTURE OF THE LOWER DIALKYLTIN SALTS OF SAID ACIDS, (2) DIGESTING THIS PRECIPITATE IN CONCENTRATED HYDROCHLORIDE ACID TO DISSOLVE THE LOWER DIALKYLTIN MOLYBDATE AND TO LEAVE BEHIND A PRECIPITATE OF THE TUNGSTEN COMPOUND.
References Cited (Backward Citations)
US2255210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |