US2931380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricated rotary plug valve
Assignee: Mueller Co
•
Filing: 1957-02-08
•
Granted: 1960-04-05
•
Expires: 1977-02-08
Abstract
No abstract record available.
Inventors
- 👤 Frank H Mueller
- 👤 Roger T Nation
- 👤 John T Eschbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/222; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4386; Y10T137/4393; Y10T137/4421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2233220A
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US2285221A
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US2281697A
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US2322379A
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US2533183A
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US2608374A
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US2653791A
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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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |