Patent US1657202A successfully refreshed from Google Patents.
US1657202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater and steam generator
Assignee: Individual
•
Filing: 1922-04-25
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Granted: 1928-01-24
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Expires: 1942-04-25
Abstract
No abstract record available.
Inventors
- 👤 Ellyson Frederick Washington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:01
CPC Classifications
F; F22; F22B; F22B27/00; F22B27/14; F28; F28D; F28D7/00; F28D7/02; F28D7/026; F28D7/10; F28D7/106
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) | 1931-01-23 | 1931-07-25 | 1932-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-23 | 1935-07-25 | 1936-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-23 | 1939-07-25 | 1940-01-24 | $7700.00 | Window Closed / Lapsed |