US3402701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating cylindrical furnace with waste heat utilization for performing exothermic processes
Assignee: Hoechst AG
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Filing: 1966-06-13
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Granted: 1968-09-24
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Herrmann Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:00
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/20; F22; F22B; F22B27/00; F22B27/12; F23M; F23M5/00; F23M5/08; F23G2203/00; F23G2203/20; F23G2203/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US518285A
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US1708526A
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US1005396A
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US1081063A
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US2293735A
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US2484161A
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US2660155A
Cited
US3034776A
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US3139866A
Cited
US3306237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |