US1911375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid heater and method of operating the same
Assignee: Babcock and Wilcox Co
•
Filing: 1930-03-14
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Granted: 1933-05-30
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Expires: 1950-03-14
Abstract
No abstract record available.
Inventors
- 👤 Charles E Lucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/02; F22D1/04; F22D1/06; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/507; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
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) | 1936-05-29 | 1936-11-28 | 1937-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-29 | 1940-11-28 | 1941-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-29 | 1944-11-28 | 1945-05-30 | $7700.00 | Window Closed / Lapsed |