Patent US2797076A successfully refreshed from Google Patents.
US2797076A
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US
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Apparatus for heating pulverulent material such as cement raw material
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1953-12-01
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Granted: 1957-06-25
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Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Muller Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:26
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025; B; B04; B04C; B04C5/00; B04C5/24; B04C5/26
Claims Analysis
Total Claims: 0
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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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |