Patent US2731646A successfully refreshed from Google Patents.
US2731646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush valve assembly
Assignee: Individual
•
Filing: 1953-10-02
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Granted: 1956-01-24
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Expires: 1973-10-02
Abstract
No abstract record available.
Inventors
- 👤 James T Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:04
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/308
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1201416A
Cited
US1364891A
Cited
US1440469A
Cited
US2142393A
Cited
US2190160A
Cited
US2602933A
Cited
US2598967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |