US1859009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water column for steam boilers
Assignee: Individual
•
Filing: 1927-07-05
•
Granted: 1932-05-17
•
Expires: 1947-07-05
Abstract
No abstract record available.
Inventors
- 👤 George W Stetson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:18
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/34; F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/425; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3143; Y10T137/3146; Y10T137/7287; Y10T137/7339; Y10T137/7342; Y10T137/7358; Y10T137/7404
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) | 1935-05-17 | 1935-11-16 | 1936-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-17 | 1939-11-16 | 1940-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-17 | 1943-11-16 | 1944-05-17 | $7700.00 | Window Closed / Lapsed |