US3004834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing phosphorus sludge obtained in the production of phosphorus
Assignee: Knapsack AG
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Filing: 1958-05-28
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Granted: 1961-10-17
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Expires: 1978-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harnisch Heinz
- 👤 Ritter Friedbert
- 👤 Rodis Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C01B25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR PROCESSING PHOSPHORUS SLUDGE OBTAINED IN THE PRODUCTION OF PHOSPHORUS, WHICH COMPRISES STEAM DISTILLING A PHOSPHORUS-CONTAINING AQUEOUS SLUDGE WHEREIN THE PHOSPHORUS PARTICLES ARE PARTIALLY ENCASED BY CONTAMINATION PARTICLES AT A TEMPERATURE OF ABOVE ABOUT 100*C. AND UNDER A PRESSURE OF BETWEEN 2 ATMOSPHERES ABSOLUTE AND ABOUT 20 ATMOSPHERES ABSOLUTE, CONDENSING THE PHOSPHORUS VAPOR AND STEAM, AND SEPARATING PURE YELLOW PHOSPHORUS FROM THE PHOSPHORUS-STEAM-CONDENSATE, SAID CONDENSATION AND SEPARATION OF PHOSPHORUS BEING CARRIED OUT IN AN INERT ATMOSPHERE.
Claim 2
Independent Claim
78 words
A METHOD FOR PROCESSING PHOSPHORUS SLUDGE OBTAINED IN THE PRODUCTION OF PHOSPHORUS, WHICH COMPRISES STEAM DISTILLING A PHOSPHORUS-CONTAINING AQUEOUS SLUDGE WHEREIN THE PHOSPHORUS PARTICLES ARE PARTIALLY ENCASED BY CONTAMINATION PARTICLES AT A TEMPERATURE OF ABOVE ABOUT 100*C. AND UNDER A PRESSURE OF BETWEEN 2 ATMOSPHERES ABSOLUTE AND ABOUT 20 ATMOSPHERES ABSOLUTE, CONDENSING THE PHOSPHORUS VAPOR AND STEAM, AND SEPARATING PURE YELLOW PHOSPHORUS FROM THE PHOSPHORUS-STEAM-CONDENSATE, SAID CONDENSATION AND SEPARATION OF PHOSPHORUS BEING CARRIED OUT IN AN INERT ATMOSPHERE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |