Patent US1972331A successfully refreshed from Google Patents.
US1972331A
Expired / Lapsed
US
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Regulating means for the water level of flush boxes
Assignee: Individual
•
Filing: 1932-03-02
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Granted: 1934-09-04
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Expires: 1952-03-02
Abstract
No abstract record available.
Inventors
- 👤 Dean Joseph Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
F; F16; F16K; F16K33/00; F16B; F16B9/00; F16B9/05; F16B9/054; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7413; Y10T137/7439; Y10T137/7475; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/57; Y10T403/5741
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) | 1937-09-03 | 1938-03-05 | 1938-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-03 | 1942-03-05 | 1942-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-03 | 1946-03-05 | 1946-09-04 | $7700.00 | Window Closed / Lapsed |