US389900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil feed-water heater
Assignee: —
•
Filing: —
•
Granted: 1888-09-25
•
Expires: 1905-09-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:20
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/02; F28D7/024; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/436; Y10S165/437
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) | 1891-09-25 | 1892-03-26 | 1892-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1895-09-25 | 1896-03-26 | 1896-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1899-09-25 | 1900-03-27 | 1900-09-26 | $7700.00 | Window Closed / Lapsed |