US3034776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary furnace
Assignee: LURGI GES fur CHEMIE und HUTTE
•
Filing: 1955-08-18
•
Granted: 1962-05-15
•
Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Hennenberger Karl-Heinz
- 👤 Georg T Heilig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2089000A
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US2175291A
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US2280571A
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US2373749A
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US2480359A
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US2670192A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |