Patent US2860037A successfully refreshed from Google Patents.
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 22:25
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)
US589967A
Cited
US862092A
Cited
GB189616255A
Cited
US1374317A
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 |