Patent US2793002A successfully refreshed from Google Patents.
US2793002A
Expired / Lapsed
US
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Gate valve construction
Assignee: HENDEY Manufacturing CORP
•
Filing: 1950-12-26
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Granted: 1957-05-21
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Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 George E Kellar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:46
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/184; F16K3/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US154121A
Cited
US653600A
Cited
GB191008923A
Cited
US1752456A
Cited
US1830999A
Cited
US1999505A
Cited
US2190147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |