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Patent US904429A successfully refreshed from Google Patents.
US904429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue-scraper.
Assignee: Individual
•
Filing: 1907-11-15
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Granted: 1908-11-17
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Expires: 1927-11-15
Abstract
No abstract record available.
Inventors
- 👤 August B Heimann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
F; F28; F28G; F28G7/00
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) | 1911-11-17 | 1912-05-18 | 1912-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-11-17 | 1916-05-18 | 1916-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-11-17 | 1920-05-18 | 1920-11-17 | $7700.00 | Window Closed / Lapsed |