Patent US2663560A successfully refreshed from Google Patents.
US2663560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat processing of fine-grained material, particularly cement raw material
Assignee: Kloeckner Humboldt Deutz AG
•
Filing: 1951-12-07
•
Granted: 1953-12-22
•
Expires: 1971-12-07
Abstract
No abstract record available.
Inventors
- 👤 Muller Franz
- 👤 Leonhard H Winners
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:49
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; B; B04; B04C; B04C5/00; B04C5/14; B04C5/15; F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US241108A
Cited
US729009A
Cited
US2014764A
Cited
US2077346A
Cited
US2290068A
Cited
US2409707A
Cited
US2554413A
Cited
US2574503A
Cited
US2574850A
Cited
US2559876A
Cited
US2648532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |