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Patent US229173A successfully refreshed from Google Patents.
US229173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam and hot-water boiler
Assignee: —
•
Filing: —
•
Granted: 1880-06-22
•
Expires: 1897-06-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/406; Y; Y10; Y10S; Y10S122/00; Y10S122/03
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) | 1883-06-22 | 1883-12-22 | 1884-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1887-06-22 | 1887-12-22 | 1888-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1891-06-22 | 1891-12-22 | 1892-06-22 | $7700.00 | Window Closed / Lapsed |