US3047366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pure arsenic and phosphorus
Assignee: Monsanto Chemicals Ltd
•
Filing: 1959-12-21
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Granted: 1962-07-31
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Forrest V Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:34
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/04; C22; C22B; C22B30/00; C22B30/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR PURIFICATION OF AN ELEMENT SELECTED FROM THE CLASS CONSISTING OF ARSENIC AND PHOSPHOROUS CONTAINING IMPURITIES OF THE GROUP OF FLUORINE, CHLORINE, AND SULFUR COMPOUNDS WHICH COMPRISES VOLATILIZING THE SAID ELEMENT AND IMPURITIES AND SUBJECTING THE SAME IN THE SUBSTANTIAL ABSENCE OF FOREIGN GASES TO A TEMPERATURE IN THE RANGE OF FROM 850* C. TO 1,000* C. AND THEREAFTER COOLING THE SAID GASEOUS MIXTURE TO CONDENSE THE PURIFIED ELEMENT.
Claim 2
Dependent Claim
71 words
A PROCESS FOR PURIFICATION OF AN ELEMENT SELECTED FROM THE CLASS CONSISTING OF ARSENIC AND PHOSPHOROUS CONTAINING IMPURITIES OF THE GROUP OF FLUORINE, CHLORINE, AND SULFUR COMPOUNDS WHICH COMPRISES VOLATILIZING THE SAID ELEMENT AND IMPURITIES AND SUBJECTING THE SAME IN THE SUBSTANTIAL ABSENCE OF FOREIGN GASES TO A TEMPERATURE IN THE RANGE OF FROM 850* C. TO 1,000* C. AND THEREAFTER COOLING THE SAID GASEOUS MIXTURE TO CONDENSE THE PURIFIED ELEMENT.
References Cited (Backward Citations)
US171813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |