Patent US190044A successfully refreshed from Google Patents.
US190044A
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Improvement in water-feeders for steam-boilers
Assignee: —
•
Filing: —
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Granted: 1877-04-24
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Expires: 1894-04-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:55
CPC Classifications
F; F22; F22D; F22D5/00; F22D5/18; F22D5/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/4322; Y10T137/4329; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1880-04-23 | 1880-10-23 | 1881-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1884-04-23 | 1884-10-23 | 1885-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1888-04-23 | 1888-10-23 | 1889-04-24 | $7700.00 | Window Closed / Lapsed |