US2917371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the continuous manufacture of calcium cyanamide
Assignee: Evonik Operations GmbH
•
Filing: 1955-10-17
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Granted: 1959-12-15
•
Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Fischer Thomas
- 👤 Kronacher Hermann
- 👤 Kaess Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:02
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/16; C01C3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN APPARATUS FOR THE CONTINUOUS NITROGENATION OF CALCIUM CARBIDE COMPRISING A STATIONARY VERTICAL TURBULENCE REACTOR, A GRID IN THE BOTTOM PORTION OF SAID REACTOR AND EXTENDING OVER THE WHOLE CROSS-SECTION THEREOF, LATERAL INLETS ABOVE SAID GRID TO CHARGE CALCIUM CARBIDE INTO SAID REACTOR, A SUBSTANTIALLY HORIZONTAL ROTARY KILN OF LARGER DIAMETER THAN SAID REACTOE, THE UPPER END OF SAID REACTOR BEING BENT AND DISCHARGING DIRECTLY INTO SAID KILN, A COOLER RECEIVING THE MATERIAL DISCHARGED FROM THE KILN, A COOLING JACKET AROUND SAID COOLER, AND MEANS FOR RECYCLING NITROGEN THROUGH SAID REACTOR, KILN, AND COOLING JACKET.
Claim 2
Independent Claim
95 words
AN APPARATUS FOR THE CONTINUOUS NITROGENATION OF CALCIUM CARBIDE COMPRISING A STATIONARY VERTICAL TURBULENCE REACTOR, A GRID IN THE BOTTOM PORTION OF SAID REACTOR AND EXTENDING OVER THE WHOLE CROSS-SECTION THEREOF, LATERAL INLETS ABOVE SAID GRID TO CHARGE CALCIUM CARBIDE INTO SAID REACTOR, A SUBSTANTIALLY HORIZONTAL ROTARY KILN OF LARGER DIAMETER THAN SAID REACTOE, THE UPPER END OF SAID REACTOR BEING BENT AND DISCHARGING DIRECTLY INTO SAID KILN, A COOLER RECEIVING THE MATERIAL DISCHARGED FROM THE KILN, A COOLING JACKET AROUND SAID COOLER, AND MEANS FOR RECYCLING NITROGEN THROUGH SAID REACTOR, KILN, AND COOLING JACKET.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |