US3457141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging of preheated coal into the coking chambers of a coke oven battery
Assignee: Krupp Wilputte Corp
•
Filing: 1964-07-20
•
Granted: 1969-07-22
•
Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/08; C10B31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1855191A
Cited
US1872883A
Cited
US2006115A
Cited
US2658862A
Cited
US2794686A
Cited
US3047473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |