US1863541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam boiler and process of firing it
Assignee: Babcock and Wilcox Co
•
Filing: 1927-12-10
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Granted: 1932-06-14
•
Expires: 1947-12-10
Abstract
No abstract record available.
Inventors
- 👤 Charles E Lucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:28
CPC Classifications
F; F23; F23L; F23L1/00; F23L1/02; F23L15/00; F23L15/04; F23L5/00; F23L5/04; F23L7/00; F23L7/002; Y; Y02; Y02E; Y02E20/00; Y02E20/34
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) | 1935-06-14 | 1935-12-14 | 1936-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-14 | 1939-12-14 | 1940-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-14 | 1943-12-14 | 1944-06-14 | $7700.00 | Window Closed / Lapsed |