Patent US3814657A successfully refreshed from Google Patents.
US291818A
Expired / Lapsed
US
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Steam-heating apparatus
Assignee: —
•
Filing: —
•
Granted: 1884-01-08
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Expires: 1901-01-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:09
CPC Classifications
F; F24; F24D; F24D1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935; Y10T137/8158; Y10T137/8225; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/87265; Y10T137/87515; Y10T137/87555
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) | 1887-01-07 | 1887-07-09 | 1888-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1891-01-07 | 1891-07-09 | 1892-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1895-01-07 | 1895-07-09 | 1896-01-08 | $7700.00 | Window Closed / Lapsed |