US2597399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valve
Assignee: KENCO PRODUCTS CORP
•
Filing: 1947-12-31
•
Granted: 1952-05-20
•
Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Vernon P Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/22; E03C1/23; E03C1/2302; F; F16; F16K; F16K5/00; F16K5/02; E03C2001/2315
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1794636A
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US1267489A
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GB141420A
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GB194642A
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US1823599A
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US1728769A
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US1845736A
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US1852123A
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US2151098A
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US2253643A
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US2313331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |