US3375531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush valve
Assignee: LAKE DERMER Inc
•
Filing: 1965-10-18
•
Granted: 1968-04-02
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:25
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/02; E03D1/14; E03D1/142; E03D1/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1767043A
Cited
US1780810A
Cited
US2776437A
Cited
US2779028A
Cited
US2754521A
Cited
US2731647A
Cited
US2925608A
Cited
US2940084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |