US3023079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of selenides and tellurides
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-09-12
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Granted: 1962-02-27
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Expires: 1978-09-12
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Kulifay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:33
CPC Classifications
C; C01; C01B; C01B19/00; C01B19/007; C01P; C01P2002/00; C01P2002/70; C01P2002/76; C01P2002/77; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
METHOD FOR THE PREPARATION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF MERCURY, PLATINUM, PALLADIUM, LEAD, INDIUM, COBALT, TIN, BISMUTH, CADMIUM, NICKEL, THALLIUM, RUTHENIUM, RHODIUM, OSMIUM, IRIDIUM, COPPER, SILVER AND GOLD TELLURIDES AND SELENIDES, WHICH COMPRISES PRECIPITATING THE DESIRED COMPOUNDS FROM MEDIA CONTAINING THE RESPECTIVE MEMBERS THEREOF BY ADMIXTURE WITH PRECIPITATING AGENTS OF THE GROUP CONSISTING OF HYPOPHOSPHOROUS ACID, PHOSPHOROUS ACID, AND PHOSPHORUS TRICHLORIDE IN THE PROPORTION OF FROM 0.1 TO 25.0 MOLECULAR WEIGHT PER ATOMIC WEIGHT OF TELLURIUM AND SELENIUM, AND ISOLATING THE DESIRED COMPOUND FROM THE MIXTURE.
Claim 2
Dependent Claim
90 words
METHOD FOR THE PREPARATION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF MERCURY, PLATINUM, PALLADIUM, LEAD, INDIUM, COBALT, TIN, BISMUTH, CADMIUM, NICKEL, THALLIUM, RUTHENIUM, RHODIUM, OSMIUM, IRIDIUM, COPPER, SILVER AND GOLD TELLURIDES AND SELENIDES, WHICH COMPRISES PRECIPITATING THE DESIRED COMPOUNDS FROM MEDIA CONTAINING THE RESPECTIVE MEMBERS THEREOF BY ADMIXTURE WITH PRECIPITATING AGENTS OF THE GROUP CONSISTING OF HYPOPHOSPHOROUS ACID, PHOSPHOROUS ACID, AND PHOSPHORUS TRICHLORIDE IN THE PROPORTION OF FROM 0.1 TO 25.0 MOLECULAR WEIGHT PER ATOMIC WEIGHT OF TELLURIUM AND SELENIUM, AND ISOLATING THE DESIRED COMPOUND FROM THE MIXTURE.
References Cited (Backward Citations)
US2534562A
Cited
US2860954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |