US2860037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of calcium carbide and phosphorus
Assignee: Individual
•
Filing: 1952-12-04
•
Granted: 1958-11-11
•
Expires: 1972-12-04
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C01B32/00; C01B32/40; C01B32/90; C01B32/914; C01B32/942; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR THE JOINT MANUFACTURE OF ELEMENTAL PHOSPHORUS AND CALCIUM CARBIDE WHICH COMPRISES REACTING A CALCIUM-PHOSPHATE-CONTAINING MINERAL WITH A CARBONACEOUS MATERIAL IN A SINGLE REACTION ZONE IN THE ELECTRIC FURNACE TO PRODUCE SIMULTANEOUSLY A PHOSPHORUS-CONTAINING GAS AND A CALCIUM CARBIDE PRODUCT CONTAINING CALCIUM PHOSPHIDE, RECOVERING ELEMENTAL PHOSPHORUS FROM SAID PHOSPHORUS-CONTAINING GAS EVOLVED FROM SAID ZONE AND THEREAFTER INTRODUCING NITROGEN GAS INTO THE CALCIUM CARBIDE PRODUCT CONTAINING CALCIUM PHOSPHIDE IN SAID SINGLE REACTION ZONE FOR A PERIOD OF TIME SUFFICIENT TO DECOMPOSE SAID CALCIUM PHOSPHIDE BUT INSUFFICIENT TO REACT FURTHER WITH SAID CALCIUM CARBIDE TO FORM CALCIUM CYANAMIDE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR THE JOINT MANUFACTURE OF ELEMENTAL PHOSPHORUS AND CALCIUM CARBIDE WHICH COMPRISES REACTING A CALCIUM-PHOSPHATE-CONTAINING MINERAL WITH A CARBONACEOUS MATERIAL IN A SINGLE REACTION ZONE IN THE ELECTRIC FURNACE TO PRODUCE SIMULTANEOUSLY A PHOSPHORUS-CONTAINING GAS AND A CALCIUM CARBIDE PRODUCT CONTAINING CALCIUM PHOSPHIDE, RECOVERING ELEMENTAL PHOSPHORUS FROM SAID PHOSPHORUS-CONTAINING GAS EVOLVED FROM SAID ZONE AND THEREAFTER INTRODUCING NITROGEN GAS INTO THE CALCIUM CARBIDE PRODUCT CONTAINING CALCIUM PHOSPHIDE IN SAID SINGLE REACTION ZONE FOR A PERIOD OF TIME SUFFICIENT TO DECOMPOSE SAID CALCIUM PHOSPHIDE BUT INSUFFICIENT TO REACT FURTHER WITH SAID CALCIUM CARBIDE TO FORM CALCIUM CYANAMIDE.
References Cited (Backward Citations)
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Cited
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Cited
GB189616255A
Cited
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Cited
US2052920A
Cited
US2289538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |