US2920873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid heating units
Assignee: Babcock and Wilcox Co
•
Filing: 1957-10-18
•
Granted: 1960-01-12
•
Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Donald C Schluderberg
- 👤 Russell L Godshalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:39
CPC Classifications
F; F22; F22G; F22G3/00; F22G3/001; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B37/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1565304A
Cited
US1818446A
Cited
US1894692A
Cited
US2067670A
Cited
US2025802A
Cited
US2437717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |