Patent US2403976A successfully refreshed from Google Patents.
US2403976A
Expired / Lapsed
US
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System of pulverizing, feeding, and transporting of material
Assignee: Babcock and Wilcox Co
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Filing: 1943-05-22
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Granted: 1946-07-16
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Expires: 1963-05-22
Abstract
No abstract record available.
Inventors
- 👤 James L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:25
CPC Classifications
B; B02; B02C; B02C19/00; F; F23; F23K; F23K3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-07-15 | 1950-01-14 | 1950-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-15 | 1954-01-14 | 1954-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-15 | 1958-01-14 | 1958-07-16 | $7700.00 | Window Closed / Lapsed |