Patent US2457472A successfully refreshed from Google Patents.
US2457472A
Expired / Lapsed
US
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Packless globe valve
Assignee: Weatherhead Co
•
Filing: 1944-05-15
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Granted: 1948-12-28
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Expires: 1964-05-15
Abstract
No abstract record available.
Inventors
- 👤 George H Hufferd
- 👤 George O R Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/06; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/903; Y10S411/00; Y10S411/90; Y10S411/901; Y10S411/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US975444A
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US1381818A
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US1731130A
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US1885457A
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US2005103A
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US2059111A
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US2076757A
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US2118300A
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US2219566A
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US2264656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |