Patent US153764A successfully refreshed from Google Patents.
US153764A
Expired / Lapsed
US
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Improvement in feed-water heaters and condensers
Assignee: —
•
Filing: —
•
Granted: 1874-08-04
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Expires: 1891-08-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:36
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/103; Y; Y10; Y10S; Y10S261/00; Y10S261/11
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) | 1877-08-03 | 1878-02-02 | 1878-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-08-03 | 1882-02-02 | 1882-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-08-03 | 1886-02-02 | 1886-08-04 | $7700.00 | Window Closed / Lapsed |