Patent US3348209A successfully refreshed from Google Patents.
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US2554040A
Expired / Lapsed
US
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Rotary plug valve
Assignee: Individual
•
Filing: 1945-04-03
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Granted: 1951-05-22
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Expires: 1965-04-03
Abstract
No abstract record available.
Inventors
- 👤 Grover C Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898147A
Cited
US1133764A
Cited
US727743A
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US826536A
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GB190923320A
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US1008097A
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US1072812A
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US1152026A
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US1534866A
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US1454222A
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US1638152A
Cited
US1674743A
Cited
US1931048A
Cited
US2115675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |