US2758664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-directional drain valve
Assignee: ROBERT S MEHR
•
Filing: 1952-06-24
•
Granted: 1956-08-14
•
Expires: 1972-06-24
Abstract
No abstract record available.
Inventors
- 👤 Steven F Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; E03C1/284; E03C1/288; E03F; E03F5/00; E03F5/04; E03F5/0401; E03F5/041; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/22; E03F2005/0416; E03F2005/0417; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7504; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7774; Y10T137/7775; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US215238A
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US433618A
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US526177A
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US1139130A
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US1721746A
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US1753724A
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FR808769A
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US2524501A
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US2615676A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |