US3201052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for crushing and cooling calcium carbide blocks
Assignee: Knapsack AG
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Filing: 1962-10-30
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Granted: 1965-08-17
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Feldmann Klaus
- 👤 Rumberg Alfred
- 👤 Klee Helmuth
- 👤 Floor Heinrich
- 👤 Schummer Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:15
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/942; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN THE PROCESS FOR COOLING CALCIUM CARBIDE SOLIDIFIED IN BLOCKS FROM THE LIQUID CALCIUM CARBIDE, THE IMPROVEMENT WHICH COMPRISES COOLING THE BLOCKS IN A FIRST COOLING STEP TO A SURFACE TEMPERATURE OF ABOUT 200*C., CRUSHING THE CLOCKS, AND COOLING THE CRUSHED MATERIAL IN A SECOND COOLING STEP IN LAYERS AT MOST 50 CM. THICK BEFORE FINALLY PROCESSING THIS MATERIAL.
Claim 2
Dependent Claim
59 words
IN THE PROCESS FOR COOLING CALCIUM CARBIDE SOLIDIFIED IN BLOCKS FROM THE LIQUID CALCIUM CARBIDE, THE IMPROVEMENT WHICH COMPRISES COOLING THE BLOCKS IN A FIRST COOLING STEP TO A SURFACE TEMPERATURE OF ABOUT 200*C., CRUSHING THE CLOCKS, AND COOLING THE CRUSHED MATERIAL IN A SECOND COOLING STEP IN LAYERS AT MOST 50 CM. THICK BEFORE FINALLY PROCESSING THIS MATERIAL.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |