US668008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic boiler-feeder.
Assignee: FRED G CUNNINGHAM
•
Filing: 1900-06-23
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Granted: 1901-02-12
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Expires: 1920-06-23
Abstract
No abstract record available.
Inventors
- 👤 William Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F17; F17C; F17C2205/00; F17C2205/01; F17C2205/0123; F17C2205/013; F17C2205/0134; F17C2205/0142
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) | 1904-02-12 | 1904-08-13 | 1905-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-02-12 | 1908-08-13 | 1909-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-02-12 | 1912-08-13 | 1913-02-12 | $7700.00 | Window Closed / Lapsed |