Patent US2911730A successfully refreshed from Google Patents.
US2911730A
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US
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Drying of divided solid materials
Assignee: Ruhrchemie AG
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Filing: 1956-03-19
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Granted: 1959-11-10
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Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Schaub Franz
- 👤 Hoffman Wilfried Von
- 👤 Roelen Otto
- 👤 Drope Winfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F26B17/101; F26B17/104; F26B17/107
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |