Patent US574422A successfully refreshed from Google Patents.
US574422A
Expired / Lapsed
US
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Boiler-flue clean
Assignee: —
•
Filing: 1896-04-28
•
Granted: 1897-01-05
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Expires: 1916-04-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:53
CPC Classifications
F; F28; F28G; F28G3/00; F28G3/02; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/0436; B08B9/047; B08B9/049; B08B9/051; F28G1/00; F28G1/08; F28G1/10; Y; Y10; Y10S; Y10S415/00; Y10S415/904
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) | 1900-01-05 | 1900-07-07 | 1901-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1904-01-06 | 1904-07-07 | 1905-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1908-01-06 | 1908-07-07 | 1909-01-06 | $7700.00 | Window Closed / Lapsed |