US3104952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering elemental phosphorus
Assignee: Hooker Chemical Corp
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Filing: 1960-08-02
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Granted: 1963-09-24
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Expires: 1980-08-02
Abstract
No abstract record available.
Inventors
- 👤 Rufus G Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C01B25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE PROCESS OF RECOVERING ELEMENTAL PHOSPHORUS FROM AN AQUEOUS SLUDGE CONTAINING ELEMENTAL PHOSPHORUS WHICH COMPRISES ADMIXING SAID SLUDGE WITH PHOSPHORIC ACID, THEN SUBJECTING SAID ADMIXTURE TO STEAM DISTILLATION IN AN INERT ATMOSPHERE FREE FROM OXIDIZING CONDITIONS, TO PRODUCE A GASEOUS PRODUCT CONTAINING ELEMENTAL PHOSPHORUS, CONDENSING SAID GASEOUS PRODUCT, AND SEPARATING ELEMENTAL PHOSPHORUS FROM THE RESULTING CONDENSATE.
Claim 2
Dependent Claim
56 words
THE PROCESS OF RECOVERING ELEMENTAL PHOSPHORUS FROM AN AQUEOUS SLUDGE CONTAINING ELEMENTAL PHOSPHORUS WHICH COMPRISES ADMIXING SAID SLUDGE WITH PHOSPHORIC ACID, THEN SUBJECTING SAID ADMIXTURE TO STEAM DISTILLATION IN AN INERT ATMOSPHERE FREE FROM OXIDIZING CONDITIONS, TO PRODUCE A GASEOUS PRODUCT CONTAINING ELEMENTAL PHOSPHORUS, CONDENSING SAID GASEOUS PRODUCT, AND SEPARATING ELEMENTAL PHOSPHORUS FROM THE RESULTING CONDENSATE.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |