Patent US3364589A successfully refreshed from Google Patents.
US3364589A
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US
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Apparatus for providing direct heatexchange between a pulverulent material and a gas
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1965-10-24
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Granted: 1968-01-23
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Muller Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:14
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |