US2767049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chalcogenides
Assignee: EIDP Inc
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Filing: 1954-10-15
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Granted: 1956-10-16
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Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Nitsche Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
C; C01; C01B; C01B19/00; C01B19/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE PROCESS WHICH COMPRISES REACTING AN ALUMINUM CHALCOGENIDE TAKEN FROM THE GROUP CONSISTINGS OF ALUMINUM SELENIDE AND ALUMINUM TELLUIRIDE, SAID CHALCOGENIDE CONTAINING ELEMENTAL ALUMINUM, WITH AN AQUEOUS AMMONIA SOLUTION, REMOVING THE INSOLUBLE MATERIALS FROMED, ADMIXING WITH RESULTING SOLUTION OF AMMONIUM CHALCOGENIDE AT LEAST ONE WATER-SOLUNLE SALT TAKEN FROM THE GROUP CONSISTING OF ZINC AND CADMIUM SALTS WHICH FROMS AN AMMONIUM COMPLEX AND RECOVERING THE METAL CHALCOGENIDE, THE REACTIONS BEING CARRIED OUT UNDER AN INERT ATMOSPHERE.
Claim 2
Dependent Claim
75 words
THE PROCESS WHICH COMPRISES REACTING AN ALUMINUM CHALCOGENIDE TAKEN FROM THE GROUP CONSISTINGS OF ALUMINUM SELENIDE AND ALUMINUM TELLUIRIDE, SAID CHALCOGENIDE CONTAINING ELEMENTAL ALUMINUM, WITH AN AQUEOUS AMMONIA SOLUTION, REMOVING THE INSOLUBLE MATERIALS FROMED, ADMIXING WITH RESULTING SOLUTION OF AMMONIUM CHALCOGENIDE AT LEAST ONE WATER-SOLUNLE SALT TAKEN FROM THE GROUP CONSISTING OF ZINC AND CADMIUM SALTS WHICH FROMS AN AMMONIUM COMPLEX AND RECOVERING THE METAL CHALCOGENIDE, THE REACTIONS BEING CARRIED OUT UNDER AN INERT ATMOSPHERE.
References Cited (Backward Citations)
No citation records indexed.
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 |