US3517628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of crude coal slurry for fuel purposes
Assignee: Deutsche Babcock and Wilcox Dampfkesselwerke AG
•
Filing: 1968-06-12
•
Granted: 1970-06-30
•
Expires: 1988-06-12
Abstract
No abstract record available.
Inventors
- 👤 Heinz Harnisch
- 👤 Heinz Friedrich Ottiny
- 👤 Rudolf V D Gathen
- 👤 Hermann Hennecke
- 👤 Werner Heitmuller
- 👤 Heinz Jochims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:12
CPC Classifications
F; F23; F23C; F23C99/00; F23C2700/00; F23C2700/06; F23C2700/066
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |