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Patent US2841385A successfully refreshed from Google Patents.
US2841385A
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US
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Rotary kiln
Assignee: Kloeckner Humboldt Deutz AG
•
Filing: 1953-12-02
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Granted: 1958-07-01
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Expires: 1973-12-02
Abstract
No abstract record available.
Inventors
- 👤 Muller Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:00
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/22; F27B7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1468168A
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US1914462A
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US2024453A
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US2111783A
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US2492792A
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US2657100A
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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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |