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US641468A
Expired / Lapsed
US
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Steam or hot-water heater.
Assignee: Individual
•
Filing: 1899-02-01
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Granted: 1900-01-16
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Expires: 1919-02-01
Abstract
No abstract record available.
Inventors
- 👤 John A Rathbone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:04
CPC Classifications
F; F22; F22B; F22B23/00; F22B23/04; F23; F23B; F23B1/00; F23B1/02; F23B1/04; F23B1/06; F23B2700/00; F23B2700/01
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) | 1903-01-16 | 1903-07-18 | 1904-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-01-16 | 1907-07-18 | 1908-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-01-16 | 1911-07-18 | 1912-01-17 | $7700.00 | Window Closed / Lapsed |