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US1764981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locomotive boiler and fire box
Assignee: Individual
•
Filing: 1928-01-11
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Granted: 1930-06-17
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Expires: 1948-01-11
Abstract
No abstract record available.
Inventors
- 👤 Louis A Rehfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:36
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/007
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) | 1933-06-16 | 1933-12-16 | 1934-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-16 | 1937-12-16 | 1938-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-16 | 1941-12-16 | 1942-06-17 | $7700.00 | Window Closed / Lapsed |