US686313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed-water heater.
Assignee: WALWORTH Manufacturing Co
•
Filing: 1900-04-16
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Granted: 1901-11-12
•
Expires: 1920-04-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/0408; F28D1/0426; F28D1/0435
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) | 1904-11-11 | 1905-05-13 | 1905-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-11-11 | 1909-05-13 | 1909-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-11-11 | 1913-05-13 | 1913-11-12 | $7700.00 | Window Closed / Lapsed |