Patent US3022797A successfully refreshed from Google Patents.
US3022797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valve
Assignee: —
•
Filing: —
•
Granted: 1962-02-27
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Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:53
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/6171; Y10T137/6174; Y10T137/6184; Y10T137/7504; Y10T137/7613; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/87265; Y10T137/87378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2655932A
Cited
US2692112A
Cited
US1464745A
Cited
US2280309A
Cited
US2370182A
Cited
GB589549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |