US2428422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for maintaining a controlled recirculation of carrier medium through an air-swept pulverizer
Assignee: Babcock and Wilcox Co
•
Filing: 1944-04-19
•
Granted: 1947-10-07
•
Expires: 1964-04-19
Abstract
No abstract record available.
Inventors
- 👤 James L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
F; F23; F23K; F23K1/00; F23K2201/00; F23K2201/10; F23K2201/1006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1365663A
Cited
US1468966A
Cited
US684152A
Cited
US1562411A
Cited
US1541903A
Cited
US1576335A
Cited
US1686719A
Cited
GB362491A
Cited
US2012802A
Cited
US2298257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |