Patent US2799489A successfully refreshed from Google Patents.
US2799489A
Expired / Lapsed
US
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Apparatus for heat treating bulk material
Assignee: Individual
•
Filing: 1954-02-23
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Granted: 1957-07-16
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Rusche Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:02
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; B; B01; B01D; B01D46/00; B01D46/30; C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B7/44; F26; F26B; F26B17/00; F26B17/12; F26B17/14; F26B17/1433; F26B17/1441; F26B17/145
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |