US280721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler-feed
Assignee: —
•
Filing: —
•
Granted: 1883-07-03
•
Expires: 1900-07-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:37
CPC Classifications
F; F22; F22D; F22D5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1812; Y10T137/7722; Y10T137/7837; Y10T137/7869
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) | 1886-07-02 | 1887-01-01 | 1887-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1890-07-02 | 1891-01-01 | 1891-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1894-07-02 | 1895-01-01 | 1895-07-03 | $7700.00 | Window Closed / Lapsed |