US2662694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tempered air swept pulverizer and classifier with common fan means to transport unclassified material and pulverized oversize particles to the classifier
Assignee: Babcock and Wilcox Co
•
Filing: 1950-04-22
•
Granted: 1953-12-15
•
Expires: 1970-04-22
Abstract
No abstract record available.
Inventors
- 👤 Lotz Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:05
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1520537A
Cited
US1591283A
Cited
US1543556A
Cited
CH112997A
Cited
US1527818A
Cited
US1955255A
Cited
GB365597A
Cited
DE682172C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |