US2904322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for discharge of material from rotary kilns
Assignee: Elektrokemisk AS
•
Filing: 1956-03-13
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Granted: 1959-09-15
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Expires: 1976-03-13
Abstract
No abstract record available.
Inventors
- 👤 Bruff William Victor Helge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:03
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/33; F27B7/32; F27B7/3205; F27B2007/327
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |