US2809378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water saving flush tank
Assignee: ALFRED J DEVALLE
•
Filing: 1956-04-27
•
Granted: 1957-10-15
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Dudley Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/02; E03D1/14; E03D1/142; E03D2001/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2440389A
Cited
US2583468A
Cited
US2626400A
Cited
US2645780A
Cited
US2685694A
Cited
US2746060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |