Patent US2913314A successfully refreshed from Google Patents.
US2913314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of tungsten carbide
Assignee: General Electric Co
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Filing: 1957-02-26
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Granted: 1959-11-17
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Robert C Osthoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:23
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/949; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS OF REMOVING FROM IMPURE TUNGSTEN CARBIDE, THE TRACE METALS WHICH REACT WITH A HALOGENATING AGENT SELECTED FROM THE GROUP CONSISTING OF HALOGENS AND HYDROHALOGENS WHICH COMPRISES CONTACTING THE IMPURE TUNGSTEN CARBIDE WITH A MIXTURE OF SIAD HALOGNATING AGENT AND AN ELECTRON DONOR SELECTED FROM THE GROUP CONSISTING FO ALKYL ETHERS, ARYL ETHERS, ALKYLARYL ETHERS, ALKYL AMINES AN ALKYL ALCOHOLS, THEREBY REACTING THE TRACE METALS WITH SAID HALOGENATING AGENT AND THEREAFTER SEPARATING THE PURIFIED TUNGSTEN CARBIDE FROM THE BALANCE OF THE REACTION MIXTURE.
Claim 2
Dependent Claim
84 words
A PROCESS OF REMOVING FROM IMPURE TUNGSTEN CARBIDE, THE TRACE METALS WHICH REACT WITH A HALOGENATING AGENT SELECTED FROM THE GROUP CONSISTING OF HALOGENS AND HYDROHALOGENS WHICH COMPRISES CONTACTING THE IMPURE TUNGSTEN CARBIDE WITH A MIXTURE OF SIAD HALOGNATING AGENT AND AN ELECTRON DONOR SELECTED FROM THE GROUP CONSISTING FO ALKYL ETHERS, ARYL ETHERS, ALKYLARYL ETHERS, ALKYL AMINES AN ALKYL ALCOHOLS, THEREBY REACTING THE TRACE METALS WITH SAID HALOGENATING AGENT AND THEREAFTER SEPARATING THE PURIFIED TUNGSTEN CARBIDE FROM THE BALANCE OF THE REACTION MIXTURE.
References Cited (Backward Citations)
US2253471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |