US692480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-heater controlling and reversing valve.
Assignee: Individual
•
Filing: 1901-05-31
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Granted: 1902-02-04
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Expires: 1921-05-31
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Robertshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:35
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/86887; Y10T137/877; Y10T137/87788; Y10T137/87829; Y10T137/87837; Y10T137/87861
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) | 1905-02-03 | 1905-08-05 | 1906-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-02-03 | 1909-08-05 | 1910-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-02-03 | 1913-08-05 | 1914-02-04 | $7700.00 | Window Closed / Lapsed |